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Finding the Fourth Proportional to 530,428.43, 732,006.69 and 288,726.59

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Solution

The fourth proportional to 530,428.43, 732,006.69 and 288,726.59 is: 398,451.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,428.43 : 732,006.69 = 288,726.59 : x
  2. Step 2: Convert to fraction form
    530,428.43/732,006.69 = 288,726.59/x
  3. Step 3: Cross multiply
    530,428.43x = 732,006.69 × 288,726.59
  4. Step 4: Simplify right side
    530,428.43x = 211,349,791,800.85
  5. Step 5: Solve for x
    x = 211,349,791,800.85/530,428.43
  6. Step 6: Final answer
    x = 398,451.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.