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Finding the Fourth Proportional to 485,800.82, 728,543.35 and 161,501.87

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Solution

The fourth proportional to 485,800.82, 728,543.35 and 161,501.87 is: 242,200.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,800.82 : 728,543.35 = 161,501.87 : x
  2. Step 2: Convert to fraction form
    485,800.82/728,543.35 = 161,501.87/x
  3. Step 3: Cross multiply
    485,800.82x = 728,543.35 × 161,501.87
  4. Step 4: Simplify right side
    485,800.82x = 117,661,109,961.06
  5. Step 5: Solve for x
    x = 117,661,109,961.06/485,800.82
  6. Step 6: Final answer
    x = 242,200.31

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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.