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Finding the Fourth Proportional to 287,430.62, 396,685.50 and 158,382.42

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Solution

The fourth proportional to 287,430.62, 396,685.50 and 158,382.42 is: 218,584.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,430.62 : 396,685.50 = 158,382.42 : x
  2. Step 2: Convert to fraction form
    287,430.62/396,685.50 = 158,382.42/x
  3. Step 3: Cross multiply
    287,430.62x = 396,685.50 × 158,382.42
  4. Step 4: Simplify right side
    287,430.62x = 62,828,009,468.91
  5. Step 5: Solve for x
    x = 62,828,009,468.91/287,430.62
  6. Step 6: Final answer
    x = 218,584.96

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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.