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Finding the Fourth Proportional to 660,022.20, 990,033.30 and 239,311.80

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Solution

The fourth proportional to 660,022.20, 990,033.30 and 239,311.80 is: 358,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,022.20 : 990,033.30 = 239,311.80 : x
  2. Step 2: Convert to fraction form
    660,022.20/990,033.30 = 239,311.80/x
  3. Step 3: Cross multiply
    660,022.20x = 990,033.30 × 239,311.80
  4. Step 4: Simplify right side
    660,022.20x = 236,926,651,082.94
  5. Step 5: Solve for x
    x = 236,926,651,082.94/660,022.20
  6. Step 6: Final answer
    x = 358,967.70

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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.