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Finding the Fourth Proportional to 391,566.30, 587,349.45 and 329,564.85

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Solution

The fourth proportional to 391,566.30, 587,349.45 and 329,564.85 is: 494,347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,566.30 : 587,349.45 = 329,564.85 : x
  2. Step 2: Convert to fraction form
    391,566.30/587,349.45 = 329,564.85/x
  3. Step 3: Cross multiply
    391,566.30x = 587,349.45 × 329,564.85
  4. Step 4: Simplify right side
    391,566.30x = 193,569,733,386.83
  5. Step 5: Solve for x
    x = 193,569,733,386.83/391,566.30
  6. Step 6: Final answer
    x = 494,347.28

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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.