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Finding the Fourth Proportional to 398,431.20, 595,918.80 and 356,613.60

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Solution

The fourth proportional to 398,431.20, 595,918.80 and 356,613.60 is: 533,373.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,431.20 : 595,918.80 = 356,613.60 : x
  2. Step 2: Convert to fraction form
    398,431.20/595,918.80 = 356,613.60/x
  3. Step 3: Cross multiply
    398,431.20x = 595,918.80 × 356,613.60
  4. Step 4: Simplify right side
    398,431.20x = 212,512,748,575.68
  5. Step 5: Solve for x
    x = 212,512,748,575.68/398,431.20
  6. Step 6: Final answer
    x = 533,373.76

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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.