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Finding the Fourth Proportional to 285,552.11, 394,053.32 and 156,489.01

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Solution

The fourth proportional to 285,552.11, 394,053.32 and 156,489.01 is: 215,950.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,552.11 : 394,053.32 = 156,489.01 : x
  2. Step 2: Convert to fraction form
    285,552.11/394,053.32 = 156,489.01/x
  3. Step 3: Cross multiply
    285,552.11x = 394,053.32 × 156,489.01
  4. Step 4: Simplify right side
    285,552.11x = 61,665,013,340.10
  5. Step 5: Solve for x
    x = 61,665,013,340.10/285,552.11
  6. Step 6: Final answer
    x = 215,950.12

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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.