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Finding the Fourth Proportional to 485,377.15, 728,087.60 and 185,780.02

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Solution

The fourth proportional to 485,377.15, 728,087.60 and 185,780.02 is: 278,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,377.15 : 728,087.60 = 185,780.02 : x
  2. Step 2: Convert to fraction form
    485,377.15/728,087.60 = 185,780.02/x
  3. Step 3: Cross multiply
    485,377.15x = 728,087.60 × 185,780.02
  4. Step 4: Simplify right side
    485,377.15x = 135,264,129,567.64
  5. Step 5: Solve for x
    x = 135,264,129,567.64/485,377.15
  6. Step 6: Final answer
    x = 278,678.40

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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.