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Finding the Fourth Proportional to 280,418.88, 386,972.88 and 159,557.52

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Solution

The fourth proportional to 280,418.88, 386,972.88 and 159,557.52 is: 220,186.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,418.88 : 386,972.88 = 159,557.52 : x
  2. Step 2: Convert to fraction form
    280,418.88/386,972.88 = 159,557.52/x
  3. Step 3: Cross multiply
    280,418.88x = 386,972.88 × 159,557.52
  4. Step 4: Simplify right side
    280,418.88x = 61,744,433,040.06
  5. Step 5: Solve for x
    x = 61,744,433,040.06/280,418.88
  6. Step 6: Final answer
    x = 220,186.43

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1.5x scale

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.