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Finding the Fourth Proportional to 660,378.20, 990,567.30 and 161,742.20

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Solution

The fourth proportional to 660,378.20, 990,567.30 and 161,742.20 is: 242,613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,378.20 : 990,567.30 = 161,742.20 : x
  2. Step 2: Convert to fraction form
    660,378.20/990,567.30 = 161,742.20/x
  3. Step 3: Cross multiply
    660,378.20x = 990,567.30 × 161,742.20
  4. Step 4: Simplify right side
    660,378.20x = 160,216,534,350.06
  5. Step 5: Solve for x
    x = 160,216,534,350.06/660,378.20
  6. Step 6: Final answer
    x = 242,613.30

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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.