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Finding the Fourth Proportional to 479,672.25, 719,442.76 and 142,764.90

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Solution

The fourth proportional to 479,672.25, 719,442.76 and 142,764.90 is: 214,127.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,672.25 : 719,442.76 = 142,764.90 : x
  2. Step 2: Convert to fraction form
    479,672.25/719,442.76 = 142,764.90/x
  3. Step 3: Cross multiply
    479,672.25x = 719,442.76 × 142,764.90
  4. Step 4: Simplify right side
    479,672.25x = 102,711,170,899.99
  5. Step 5: Solve for x
    x = 102,711,170,899.99/479,672.25
  6. Step 6: Final answer
    x = 214,127.82

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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.