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Finding the Fourth Proportional to 391,570.80, 587,356.20 and 329,569.35

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Solution

The fourth proportional to 391,570.80, 587,356.20 and 329,569.35 is: 494,354.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.80 : 587,356.20 = 329,569.35 : x
  2. Step 2: Convert to fraction form
    391,570.80/587,356.20 = 329,569.35/x
  3. Step 3: Cross multiply
    391,570.80x = 587,356.20 × 329,569.35
  4. Step 4: Simplify right side
    391,570.80x = 193,574,601,052.47
  5. Step 5: Solve for x
    x = 193,574,601,052.47/391,570.80
  6. Step 6: Final answer
    x = 494,354.03

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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.