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Finding the Fourth Proportional to 485,442.92, 669,474.96 and 304,174.28

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Solution

The fourth proportional to 485,442.92, 669,474.96 and 304,174.28 is: 419,487.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,442.92 : 669,474.96 = 304,174.28 : x
  2. Step 2: Convert to fraction form
    485,442.92/669,474.96 = 304,174.28/x
  3. Step 3: Cross multiply
    485,442.92x = 669,474.96 × 304,174.28
  4. Step 4: Simplify right side
    485,442.92x = 203,637,063,936.03
  5. Step 5: Solve for x
    x = 203,637,063,936.03/485,442.92
  6. Step 6: Final answer
    x = 419,487.14

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.