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Finding the Fourth Proportional to 978,923.28, 1,351,388.76 and 656,515.44

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Solution

The fourth proportional to 978,923.28, 1,351,388.76 and 656,515.44 is: 906,309.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,923.28 : 1,351,388.76 = 656,515.44 : x
  2. Step 2: Convert to fraction form
    978,923.28/1,351,388.76 = 656,515.44/x
  3. Step 3: Cross multiply
    978,923.28x = 1,351,388.76 × 656,515.44
  4. Step 4: Simplify right side
    978,923.28x = 887,207,586,382.45
  5. Step 5: Solve for x
    x = 887,207,586,382.45/978,923.28
  6. Step 6: Final answer
    x = 906,309.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.