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Finding the Fourth Proportional to 391,432.86, 540,168.12 and 230,298.30

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Solution

The fourth proportional to 391,432.86, 540,168.12 and 230,298.30 is: 317,806.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,432.86 : 540,168.12 = 230,298.30 : x
  2. Step 2: Convert to fraction form
    391,432.86/540,168.12 = 230,298.30/x
  3. Step 3: Cross multiply
    391,432.86x = 540,168.12 × 230,298.30
  4. Step 4: Simplify right side
    391,432.86x = 124,399,799,750.20
  5. Step 5: Solve for x
    x = 124,399,799,750.20/391,432.86
  6. Step 6: Final answer
    x = 317,806.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.