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Finding the Fourth Proportional to 811,653.60, 1,217,480.40 and 368,421.60

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Solution

The fourth proportional to 811,653.60, 1,217,480.40 and 368,421.60 is: 552,632.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,653.60 : 1,217,480.40 = 368,421.60 : x
  2. Step 2: Convert to fraction form
    811,653.60/1,217,480.40 = 368,421.60/x
  3. Step 3: Cross multiply
    811,653.60x = 1,217,480.40 × 368,421.60
  4. Step 4: Simplify right side
    811,653.60x = 448,546,076,936.64
  5. Step 5: Solve for x
    x = 448,546,076,936.64/811,653.60
  6. Step 6: Final answer
    x = 552,632.40

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Half scale
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Double scale
Find fourth proportional to 811,654.60, 1,217,481.90 and 368,422.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.