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Finding the Fourth Proportional to 661,656.70, 992,485.05 and 346,210.30

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Solution

The fourth proportional to 661,656.70, 992,485.05 and 346,210.30 is: 519,315.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,656.70 : 992,485.05 = 346,210.30 : x
  2. Step 2: Convert to fraction form
    661,656.70/992,485.05 = 346,210.30/x
  3. Step 3: Cross multiply
    661,656.70x = 992,485.05 × 346,210.30
  4. Step 4: Simplify right side
    661,656.70x = 343,608,546,906.02
  5. Step 5: Solve for x
    x = 343,608,546,906.02/661,656.70
  6. Step 6: Final answer
    x = 519,315.45

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Half scale
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Double scale
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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.