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Finding the Fourth Proportional to 215,200.80, 322,801.20 and 65,439.90

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Solution

The fourth proportional to 215,200.80, 322,801.20 and 65,439.90 is: 98,159.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,200.80 : 322,801.20 = 65,439.90 : x
  2. Step 2: Convert to fraction form
    215,200.80/322,801.20 = 65,439.90/x
  3. Step 3: Cross multiply
    215,200.80x = 322,801.20 × 65,439.90
  4. Step 4: Simplify right side
    215,200.80x = 21,124,078,247.88
  5. Step 5: Solve for x
    x = 21,124,078,247.88/215,200.80
  6. Step 6: Final answer
    x = 98,159.85

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1.5x scale

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.