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Finding the Fourth Proportional to 660,872.40, 992,086.20 and 656,206.80

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Solution

The fourth proportional to 660,872.40, 992,086.20 and 656,206.80 is: 985,082.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,872.40 : 992,086.20 = 656,206.80 : x
  2. Step 2: Convert to fraction form
    660,872.40/992,086.20 = 656,206.80/x
  3. Step 3: Cross multiply
    660,872.40x = 992,086.20 × 656,206.80
  4. Step 4: Simplify right side
    660,872.40x = 651,013,710,626.16
  5. Step 5: Solve for x
    x = 651,013,710,626.16/660,872.40
  6. Step 6: Final answer
    x = 985,082.31

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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.