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Finding the Fourth Proportional to 697,095.75, 961,989.42 and 391,171.42

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Solution

The fourth proportional to 697,095.75, 961,989.42 and 391,171.42 is: 539,815.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,095.75 : 961,989.42 = 391,171.42 : x
  2. Step 2: Convert to fraction form
    697,095.75/961,989.42 = 391,171.42/x
  3. Step 3: Cross multiply
    697,095.75x = 961,989.42 × 391,171.42
  4. Step 4: Simplify right side
    697,095.75x = 376,302,767,446.38
  5. Step 5: Solve for x
    x = 376,302,767,446.38/697,095.75
  6. Step 6: Final answer
    x = 539,815.04

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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.