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Finding the Fourth Proportional to 652,986.80, 978,443.40 and 485,025.20

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Solution

The fourth proportional to 652,986.80, 978,443.40 and 485,025.20 is: 726,767.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,986.80 : 978,443.40 = 485,025.20 : x
  2. Step 2: Convert to fraction form
    652,986.80/978,443.40 = 485,025.20/x
  3. Step 3: Cross multiply
    652,986.80x = 978,443.40 × 485,025.20
  4. Step 4: Simplify right side
    652,986.80x = 474,569,705,773.68
  5. Step 5: Solve for x
    x = 474,569,705,773.68/652,986.80
  6. Step 6: Final answer
    x = 726,767.69

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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.