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Finding the Fourth Proportional to 611,559.10, 917,338.65 and 190,780.30

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Solution

The fourth proportional to 611,559.10, 917,338.65 and 190,780.30 is: 286,170.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,559.10 : 917,338.65 = 190,780.30 : x
  2. Step 2: Convert to fraction form
    611,559.10/917,338.65 = 190,780.30/x
  3. Step 3: Cross multiply
    611,559.10x = 917,338.65 × 190,780.30
  4. Step 4: Simplify right side
    611,559.10x = 175,010,142,848.60
  5. Step 5: Solve for x
    x = 175,010,142,848.60/611,559.10
  6. Step 6: Final answer
    x = 286,170.45

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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.