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Finding the Fourth Proportional to 485,707.83, 728,723.08 and 215,798.41

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Solution

The fourth proportional to 485,707.83, 728,723.08 and 215,798.41 is: 323,769.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,707.83 : 728,723.08 = 215,798.41 : x
  2. Step 2: Convert to fraction form
    485,707.83/728,723.08 = 215,798.41/x
  3. Step 3: Cross multiply
    485,707.83x = 728,723.08 × 215,798.41
  4. Step 4: Simplify right side
    485,707.83x = 157,257,283,174.96
  5. Step 5: Solve for x
    x = 157,257,283,174.96/485,707.83
  6. Step 6: Final answer
    x = 323,769.30

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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.