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Finding the Fourth Proportional to 288,689.52, 398,375.42 and 159,620.55

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Solution

The fourth proportional to 288,689.52, 398,375.42 and 159,620.55 is: 220,267.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,689.52 : 398,375.42 = 159,620.55 : x
  2. Step 2: Convert to fraction form
    288,689.52/398,375.42 = 159,620.55/x
  3. Step 3: Cross multiply
    288,689.52x = 398,375.42 × 159,620.55
  4. Step 4: Simplify right side
    288,689.52x = 63,588,903,646.88
  5. Step 5: Solve for x
    x = 63,588,903,646.88/288,689.52
  6. Step 6: Final answer
    x = 220,267.45

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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.