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Finding the Fourth Proportional to 491,083.20, 736,624.80 and 280,742.40

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Solution

The fourth proportional to 491,083.20, 736,624.80 and 280,742.40 is: 421,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,083.20 : 736,624.80 = 280,742.40 : x
  2. Step 2: Convert to fraction form
    491,083.20/736,624.80 = 280,742.40/x
  3. Step 3: Cross multiply
    491,083.20x = 736,624.80 × 280,742.40
  4. Step 4: Simplify right side
    491,083.20x = 206,801,814,251.52
  5. Step 5: Solve for x
    x = 206,801,814,251.52/491,083.20
  6. Step 6: Final answer
    x = 421,113.60

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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.