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Finding the Fourth Proportional to 485,665.30, 728,082.42 and 186,360.66

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Solution

The fourth proportional to 485,665.30, 728,082.42 and 186,360.66 is: 279,381.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,665.30 : 728,082.42 = 186,360.66 : x
  2. Step 2: Convert to fraction form
    485,665.30/728,082.42 = 186,360.66/x
  3. Step 3: Cross multiply
    485,665.30x = 728,082.42 × 186,360.66
  4. Step 4: Simplify right side
    485,665.30x = 135,685,920,325.60
  5. Step 5: Solve for x
    x = 135,685,920,325.60/485,665.30
  6. Step 6: Final answer
    x = 279,381.54

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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.