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Finding the Fourth Proportional to 287,539.50, 396,788.43 and 158,473.74

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Solution

The fourth proportional to 287,539.50, 396,788.43 and 158,473.74 is: 218,684.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,539.50 : 396,788.43 = 158,473.74 : x
  2. Step 2: Convert to fraction form
    287,539.50/396,788.43 = 158,473.74/x
  3. Step 3: Cross multiply
    287,539.50x = 396,788.43 × 158,473.74
  4. Step 4: Simplify right side
    287,539.50x = 62,880,546,490.83
  5. Step 5: Solve for x
    x = 62,880,546,490.83/287,539.50
  6. Step 6: Final answer
    x = 218,684.90

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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.