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Finding the Fourth Proportional to 709,358.84, 978,938.83 and 387,086.62

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Solution

The fourth proportional to 709,358.84, 978,938.83 and 387,086.62 is: 534,192.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,358.84 : 978,938.83 = 387,086.62 : x
  2. Step 2: Convert to fraction form
    709,358.84/978,938.83 = 387,086.62/x
  3. Step 3: Cross multiply
    709,358.84x = 978,938.83 × 387,086.62
  4. Step 4: Simplify right side
    709,358.84x = 378,934,122,891.46
  5. Step 5: Solve for x
    x = 378,934,122,891.46/709,358.84
  6. Step 6: Final answer
    x = 534,192.43

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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.