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Finding the Fourth Proportional to 485,625.58, 728,648.66 and 260,723.61

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Solution

The fourth proportional to 485,625.58, 728,648.66 and 260,723.61 is: 391,198.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,625.58 : 728,648.66 = 260,723.61 : x
  2. Step 2: Convert to fraction form
    485,625.58/728,648.66 = 260,723.61/x
  3. Step 3: Cross multiply
    485,625.58x = 728,648.66 × 260,723.61
  4. Step 4: Simplify right side
    485,625.58x = 189,975,909,708.67
  5. Step 5: Solve for x
    x = 189,975,909,708.67/485,625.58
  6. Step 6: Final answer
    x = 391,198.32

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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.