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Finding the Fourth Proportional to 708,628.40, 1,063,007.40 and 287,817.20

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Solution

The fourth proportional to 708,628.40, 1,063,007.40 and 287,817.20 is: 431,752.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,628.40 : 1,063,007.40 = 287,817.20 : x
  2. Step 2: Convert to fraction form
    708,628.40/1,063,007.40 = 287,817.20/x
  3. Step 3: Cross multiply
    708,628.40x = 1,063,007.40 × 287,817.20
  4. Step 4: Simplify right side
    708,628.40x = 305,951,813,447.28
  5. Step 5: Solve for x
    x = 305,951,813,447.28/708,628.40
  6. Step 6: Final answer
    x = 431,752.12

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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.