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Finding the Fourth Proportional to 660,545.28, 990,817.92 and 286,560

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Solution

The fourth proportional to 660,545.28, 990,817.92 and 286,560 is: 429,840

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,545.28 : 990,817.92 = 286,560 : x
  2. Step 2: Convert to fraction form
    660,545.28/990,817.92 = 286,560/x
  3. Step 3: Cross multiply
    660,545.28x = 990,817.92 × 286,560
  4. Step 4: Simplify right side
    660,545.28x = 283,928,783,155.20
  5. Step 5: Solve for x
    x = 283,928,783,155.20/660,545.28
  6. Step 6: Final answer
    x = 429,840

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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.