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Finding the Fourth Proportional to 491,421.80, 737,031.90 and 136,346.60

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Solution

The fourth proportional to 491,421.80, 737,031.90 and 136,346.60 is: 204,491.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,421.80 : 737,031.90 = 136,346.60 : x
  2. Step 2: Convert to fraction form
    491,421.80/737,031.90 = 136,346.60/x
  3. Step 3: Cross multiply
    491,421.80x = 737,031.90 × 136,346.60
  4. Step 4: Simplify right side
    491,421.80x = 100,491,793,656.54
  5. Step 5: Solve for x
    x = 100,491,793,656.54/491,421.80
  6. Step 6: Final answer
    x = 204,491.93

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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.