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Finding the Fourth Proportional to 343,421.60, 515,132.40 and 231,447.20

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Solution

The fourth proportional to 343,421.60, 515,132.40 and 231,447.20 is: 347,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,421.60 : 515,132.40 = 231,447.20 : x
  2. Step 2: Convert to fraction form
    343,421.60/515,132.40 = 231,447.20/x
  3. Step 3: Cross multiply
    343,421.60x = 515,132.40 × 231,447.20
  4. Step 4: Simplify right side
    343,421.60x = 119,225,951,609.28
  5. Step 5: Solve for x
    x = 119,225,951,609.28/343,421.60
  6. Step 6: Final answer
    x = 347,170.80

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1.5x scale

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.