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Finding the Fourth Proportional to 667,475.72, 921,111.06 and 361,545.02

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Solution

The fourth proportional to 667,475.72, 921,111.06 and 361,545.02 is: 498,929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,475.72 : 921,111.06 = 361,545.02 : x
  2. Step 2: Convert to fraction form
    667,475.72/921,111.06 = 361,545.02/x
  3. Step 3: Cross multiply
    667,475.72x = 921,111.06 × 361,545.02
  4. Step 4: Simplify right side
    667,475.72x = 333,023,116,609.92
  5. Step 5: Solve for x
    x = 333,023,116,609.92/667,475.72
  6. Step 6: Final answer
    x = 498,929.18

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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.