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Finding the Fourth Proportional to 479,374.96, 661,445.04 and 288,400.66

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Solution

The fourth proportional to 479,374.96, 661,445.04 and 288,400.66 is: 397,937.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,374.96 : 661,445.04 = 288,400.66 : x
  2. Step 2: Convert to fraction form
    479,374.96/661,445.04 = 288,400.66/x
  3. Step 3: Cross multiply
    479,374.96x = 661,445.04 × 288,400.66
  4. Step 4: Simplify right side
    479,374.96x = 190,761,186,089.73
  5. Step 5: Solve for x
    x = 190,761,186,089.73/479,374.96
  6. Step 6: Final answer
    x = 397,937.32

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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.