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Finding the Fourth Proportional to 279,569.76, 385,813.92 and 158,716.32

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Solution

The fourth proportional to 279,569.76, 385,813.92 and 158,716.32 is: 219,032.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,569.76 : 385,813.92 = 158,716.32 : x
  2. Step 2: Convert to fraction form
    279,569.76/385,813.92 = 158,716.32/x
  3. Step 3: Cross multiply
    279,569.76x = 385,813.92 × 158,716.32
  4. Step 4: Simplify right side
    279,569.76x = 61,234,965,587.17
  5. Step 5: Solve for x
    x = 61,234,965,587.17/279,569.76
  6. Step 6: Final answer
    x = 219,032.87

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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.