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Finding the Fourth Proportional to 485,428.05, 728,142.08 and 308,718.45

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Solution

The fourth proportional to 485,428.05, 728,142.08 and 308,718.45 is: 463,077.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,428.05 : 728,142.08 = 308,718.45 : x
  2. Step 2: Convert to fraction form
    485,428.05/728,142.08 = 308,718.45/x
  3. Step 3: Cross multiply
    485,428.05x = 728,142.08 × 308,718.45
  4. Step 4: Simplify right side
    485,428.05x = 224,790,892,773.78
  5. Step 5: Solve for x
    x = 224,790,892,773.78/485,428.05
  6. Step 6: Final answer
    x = 463,077.68

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Similar ratio
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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.