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Finding the Fourth Proportional to 485,731.39, 728,598.45 and 186,303.75

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Solution

The fourth proportional to 485,731.39, 728,598.45 and 186,303.75 is: 279,456.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,731.39 : 728,598.45 = 186,303.75 : x
  2. Step 2: Convert to fraction form
    485,731.39/728,598.45 = 186,303.75/x
  3. Step 3: Cross multiply
    485,731.39x = 728,598.45 × 186,303.75
  4. Step 4: Simplify right side
    485,731.39x = 135,740,620,726.17
  5. Step 5: Solve for x
    x = 135,740,620,726.17/485,731.39
  6. Step 6: Final answer
    x = 279,456.15

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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.