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Finding the Fourth Proportional to 347,720.40, 521,580.60 and 331,390.80

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Solution

The fourth proportional to 347,720.40, 521,580.60 and 331,390.80 is: 497,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,720.40 : 521,580.60 = 331,390.80 : x
  2. Step 2: Convert to fraction form
    347,720.40/521,580.60 = 331,390.80/x
  3. Step 3: Cross multiply
    347,720.40x = 521,580.60 × 331,390.80
  4. Step 4: Simplify right side
    347,720.40x = 172,847,012,298.48
  5. Step 5: Solve for x
    x = 172,847,012,298.48/347,720.40
  6. Step 6: Final answer
    x = 497,086.20

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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.