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Finding the Fourth Proportional to 287,618.75, 431,523.80 and 127,672.50

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Solution

The fourth proportional to 287,618.75, 431,523.80 and 127,672.50 is: 191,551.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,618.75 : 431,523.80 = 127,672.50 : x
  2. Step 2: Convert to fraction form
    287,618.75/431,523.80 = 127,672.50/x
  3. Step 3: Cross multiply
    287,618.75x = 431,523.80 × 127,672.50
  4. Step 4: Simplify right side
    287,618.75x = 55,093,722,355.50
  5. Step 5: Solve for x
    x = 55,093,722,355.50/287,618.75
  6. Step 6: Final answer
    x = 191,551.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.