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Finding the Fourth Proportional to 287,434.86, 396,660.48 and 156,611.82

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Solution

The fourth proportional to 287,434.86, 396,660.48 and 156,611.82 is: 216,124.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,434.86 : 396,660.48 = 156,611.82 : x
  2. Step 2: Convert to fraction form
    287,434.86/396,660.48 = 156,611.82/x
  3. Step 3: Cross multiply
    287,434.86x = 396,660.48 × 156,611.82
  4. Step 4: Simplify right side
    287,434.86x = 62,121,719,694.87
  5. Step 5: Solve for x
    x = 62,121,719,694.87/287,434.86
  6. Step 6: Final answer
    x = 216,124.51

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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.