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Finding the Fourth Proportional to 479,372.96, 661,442.28 and 288,398.66

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Solution

The fourth proportional to 479,372.96, 661,442.28 and 288,398.66 is: 397,934.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,372.96 : 661,442.28 = 288,398.66 : x
  2. Step 2: Convert to fraction form
    479,372.96/661,442.28 = 288,398.66/x
  3. Step 3: Cross multiply
    479,372.96x = 661,442.28 × 288,398.66
  4. Step 4: Simplify right side
    479,372.96x = 190,759,067,219.35
  5. Step 5: Solve for x
    x = 190,759,067,219.35/479,372.96
  6. Step 6: Final answer
    x = 397,934.56

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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.