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Finding the Fourth Proportional to 660,359.20, 990,481.20 and 217,127.20

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Solution

The fourth proportional to 660,359.20, 990,481.20 and 217,127.20 is: 325,671.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,359.20 : 990,481.20 = 217,127.20 : x
  2. Step 2: Convert to fraction form
    660,359.20/990,481.20 = 217,127.20/x
  3. Step 3: Cross multiply
    660,359.20x = 990,481.20 × 217,127.20
  4. Step 4: Simplify right side
    660,359.20x = 215,060,409,608.64
  5. Step 5: Solve for x
    x = 215,060,409,608.64/660,359.20
  6. Step 6: Final answer
    x = 325,671.86

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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.