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Finding the Fourth Proportional to 660,133.40, 990,200.10 and 280,956.20

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Solution

The fourth proportional to 660,133.40, 990,200.10 and 280,956.20 is: 421,434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,133.40 : 990,200.10 = 280,956.20 : x
  2. Step 2: Convert to fraction form
    660,133.40/990,200.10 = 280,956.20/x
  3. Step 3: Cross multiply
    660,133.40x = 990,200.10 × 280,956.20
  4. Step 4: Simplify right side
    660,133.40x = 278,202,857,335.62
  5. Step 5: Solve for x
    x = 278,202,857,335.62/660,133.40
  6. Step 6: Final answer
    x = 421,434.30

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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.