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Finding the Fourth Proportional to 391,421.60, 540,152.65 and 230,287.02

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Solution

The fourth proportional to 391,421.60, 540,152.65 and 230,287.02 is: 317,790.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,421.60 : 540,152.65 = 230,287.02 : x
  2. Step 2: Convert to fraction form
    391,421.60/540,152.65 = 230,287.02/x
  3. Step 3: Cross multiply
    391,421.60x = 540,152.65 × 230,287.02
  4. Step 4: Simplify right side
    391,421.60x = 124,390,142,375.89
  5. Step 5: Solve for x
    x = 124,390,142,375.89/391,421.60
  6. Step 6: Final answer
    x = 317,790.70

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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.