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Finding the Fourth Proportional to 660,391.20, 990,586.80 and 161,755.20

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Solution

The fourth proportional to 660,391.20, 990,586.80 and 161,755.20 is: 242,632.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,391.20 : 990,586.80 = 161,755.20 : x
  2. Step 2: Convert to fraction form
    660,391.20/990,586.80 = 161,755.20/x
  3. Step 3: Cross multiply
    660,391.20x = 990,586.80 × 161,755.20
  4. Step 4: Simplify right side
    660,391.20x = 160,232,565,951.36
  5. Step 5: Solve for x
    x = 160,232,565,951.36/660,391.20
  6. Step 6: Final answer
    x = 242,632.80

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Similar ratio
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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.