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Finding the Fourth Proportional to 391,570.90, 587,356.35 and 344,914.90

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Solution

The fourth proportional to 391,570.90, 587,356.35 and 344,914.90 is: 517,372.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.90 : 587,356.35 = 344,914.90 : x
  2. Step 2: Convert to fraction form
    391,570.90/587,356.35 = 344,914.90/x
  3. Step 3: Cross multiply
    391,570.90x = 587,356.35 × 344,914.90
  4. Step 4: Simplify right side
    391,570.90x = 202,587,956,724.62
  5. Step 5: Solve for x
    x = 202,587,956,724.62/391,570.90
  6. Step 6: Final answer
    x = 517,372.35

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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.