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Finding the Fourth Proportional to 391,501.60, 587,252.40 and 334,420.90

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Solution

The fourth proportional to 391,501.60, 587,252.40 and 334,420.90 is: 501,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,501.60 : 587,252.40 = 334,420.90 : x
  2. Step 2: Convert to fraction form
    391,501.60/587,252.40 = 334,420.90/x
  3. Step 3: Cross multiply
    391,501.60x = 587,252.40 × 334,420.90
  4. Step 4: Simplify right side
    391,501.60x = 196,389,476,135.16
  5. Step 5: Solve for x
    x = 196,389,476,135.16/391,501.60
  6. Step 6: Final answer
    x = 501,631.35

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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.