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Finding the Fourth Proportional to 391,570.55, 587,355.83 and 329,569.10

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Solution

The fourth proportional to 391,570.55, 587,355.83 and 329,569.10 is: 494,353.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.55 : 587,355.83 = 329,569.10 : x
  2. Step 2: Convert to fraction form
    391,570.55/587,355.83 = 329,569.10/x
  3. Step 3: Cross multiply
    391,570.55x = 587,355.83 × 329,569.10
  4. Step 4: Simplify right side
    391,570.55x = 193,574,332,272.85
  5. Step 5: Solve for x
    x = 193,574,332,272.85/391,570.55
  6. Step 6: Final answer
    x = 494,353.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.