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Finding the Fourth Proportional to 652,921.20, 978,069.60 and 440,344.80

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Solution

The fourth proportional to 652,921.20, 978,069.60 and 440,344.80 is: 659,632.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,921.20 : 978,069.60 = 440,344.80 : x
  2. Step 2: Convert to fraction form
    652,921.20/978,069.60 = 440,344.80/x
  3. Step 3: Cross multiply
    652,921.20x = 978,069.60 × 440,344.80
  4. Step 4: Simplify right side
    652,921.20x = 430,687,862,398.08
  5. Step 5: Solve for x
    x = 430,687,862,398.08/652,921.20
  6. Step 6: Final answer
    x = 659,632.22

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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.