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Finding the Fourth Proportional to 665,657.20, 998,631.60 and 216,301.60

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Solution

The fourth proportional to 665,657.20, 998,631.60 and 216,301.60 is: 324,499.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,657.20 : 998,631.60 = 216,301.60 : x
  2. Step 2: Convert to fraction form
    665,657.20/998,631.60 = 216,301.60/x
  3. Step 3: Cross multiply
    665,657.20x = 998,631.60 × 216,301.60
  4. Step 4: Simplify right side
    665,657.20x = 216,005,612,890.56
  5. Step 5: Solve for x
    x = 216,005,612,890.56/665,657.20
  6. Step 6: Final answer
    x = 324,499.78

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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.