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Finding the Fourth Proportional to 478,354.50, 660,129.21 and 263,493.90

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Solution

The fourth proportional to 478,354.50, 660,129.21 and 263,493.90 is: 363,621.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,354.50 : 660,129.21 = 263,493.90 : x
  2. Step 2: Convert to fraction form
    478,354.50/660,129.21 = 263,493.90/x
  3. Step 3: Cross multiply
    478,354.50x = 660,129.21 × 263,493.90
  4. Step 4: Simplify right side
    478,354.50x = 173,940,020,046.82
  5. Step 5: Solve for x
    x = 173,940,020,046.82/478,354.50
  6. Step 6: Final answer
    x = 363,621.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.