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Finding the Fourth Proportional to 215,219.80, 322,829.70 and 65,458.90

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Solution

The fourth proportional to 215,219.80, 322,829.70 and 65,458.90 is: 98,188.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,219.80 : 322,829.70 = 65,458.90 : x
  2. Step 2: Convert to fraction form
    215,219.80/322,829.70 = 65,458.90/x
  3. Step 3: Cross multiply
    215,219.80x = 322,829.70 × 65,458.90
  4. Step 4: Simplify right side
    215,219.80x = 21,132,077,049.33
  5. Step 5: Solve for x
    x = 21,132,077,049.33/215,219.80
  6. Step 6: Final answer
    x = 98,188.35

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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.