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Finding the Fourth Proportional to 644,061.87, 888,764.25 and 357,581.88

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Solution

The fourth proportional to 644,061.87, 888,764.25 and 357,581.88 is: 493,440.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,061.87 : 888,764.25 = 357,581.88 : x
  2. Step 2: Convert to fraction form
    644,061.87/888,764.25 = 357,581.88/x
  3. Step 3: Cross multiply
    644,061.87x = 888,764.25 × 357,581.88
  4. Step 4: Simplify right side
    644,061.87x = 317,805,991,391.79
  5. Step 5: Solve for x
    x = 317,805,991,391.79/644,061.87
  6. Step 6: Final answer
    x = 493,440.16

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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.