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Finding the Fourth Proportional to 696,522.30, 961,211.78 and 390,666.70

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Solution

The fourth proportional to 696,522.30, 961,211.78 and 390,666.70 is: 539,126.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,522.30 : 961,211.78 = 390,666.70 : x
  2. Step 2: Convert to fraction form
    696,522.30/961,211.78 = 390,666.70/x
  3. Step 3: Cross multiply
    696,522.30x = 961,211.78 × 390,666.70
  4. Step 4: Simplify right side
    696,522.30x = 375,513,434,093.73
  5. Step 5: Solve for x
    x = 375,513,434,093.73/696,522.30
  6. Step 6: Final answer
    x = 539,126.22

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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.