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Finding the Fourth Proportional to 485,723.70, 728,455.95 and 170,147.70

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Solution

The fourth proportional to 485,723.70, 728,455.95 and 170,147.70 is: 255,176.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,723.70 : 728,455.95 = 170,147.70 : x
  2. Step 2: Convert to fraction form
    485,723.70/728,455.95 = 170,147.70/x
  3. Step 3: Cross multiply
    485,723.70x = 728,455.95 × 170,147.70
  4. Step 4: Simplify right side
    485,723.70x = 123,945,104,443.82
  5. Step 5: Solve for x
    x = 123,945,104,443.82/485,723.70
  6. Step 6: Final answer
    x = 255,176.15

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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.