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Finding the Fourth Proportional to 660,373.20, 990,502.20 and 217,141.20

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Solution

The fourth proportional to 660,373.20, 990,502.20 and 217,141.20 is: 325,692.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,373.20 : 990,502.20 = 217,141.20 : x
  2. Step 2: Convert to fraction form
    660,373.20/990,502.20 = 217,141.20/x
  3. Step 3: Cross multiply
    660,373.20x = 990,502.20 × 217,141.20
  4. Step 4: Simplify right side
    660,373.20x = 215,078,836,310.64
  5. Step 5: Solve for x
    x = 215,078,836,310.64/660,373.20
  6. Step 6: Final answer
    x = 325,692.86

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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.