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Finding the Fourth Proportional to 491,161.70, 736,742.55 and 280,820.90

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Solution

The fourth proportional to 491,161.70, 736,742.55 and 280,820.90 is: 421,231.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,161.70 : 736,742.55 = 280,820.90 : x
  2. Step 2: Convert to fraction form
    491,161.70/736,742.55 = 280,820.90/x
  3. Step 3: Cross multiply
    491,161.70x = 736,742.55 × 280,820.90
  4. Step 4: Simplify right side
    491,161.70x = 206,892,705,959.30
  5. Step 5: Solve for x
    x = 206,892,705,959.30/491,161.70
  6. Step 6: Final answer
    x = 421,231.35

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Similar ratio
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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.