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Finding the Fourth Proportional to 680,628.80, 1,019,906.40 and 574,875.20

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Solution

The fourth proportional to 680,628.80, 1,019,906.40 and 574,875.20 is: 861,437.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,628.80 : 1,019,906.40 = 574,875.20 : x
  2. Step 2: Convert to fraction form
    680,628.80/1,019,906.40 = 574,875.20/x
  3. Step 3: Cross multiply
    680,628.80x = 1,019,906.40 × 574,875.20
  4. Step 4: Simplify right side
    680,628.80x = 586,318,895,681.28
  5. Step 5: Solve for x
    x = 586,318,895,681.28/680,628.80
  6. Step 6: Final answer
    x = 861,437.09

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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.