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Finding the Fourth Proportional to 486,272.58, 728,909.91 and 186,672.48

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Solution

The fourth proportional to 486,272.58, 728,909.91 and 186,672.48 is: 279,817.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,272.58 : 728,909.91 = 186,672.48 : x
  2. Step 2: Convert to fraction form
    486,272.58/728,909.91 = 186,672.48/x
  3. Step 3: Cross multiply
    486,272.58x = 728,909.91 × 186,672.48
  4. Step 4: Simplify right side
    486,272.58x = 136,067,420,596.28
  5. Step 5: Solve for x
    x = 136,067,420,596.28/486,272.58
  6. Step 6: Final answer
    x = 279,817.18

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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.