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Finding the Fourth Proportional to 442,891.20, 618,648 and 442,891.20

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Solution

The fourth proportional to 442,891.20, 618,648 and 442,891.20 is: 618,648

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,891.20 : 618,648 = 442,891.20 : x
  2. Step 2: Convert to fraction form
    442,891.20/618,648 = 442,891.20/x
  3. Step 3: Cross multiply
    442,891.20x = 618,648 × 442,891.20
  4. Step 4: Simplify right side
    442,891.20x = 273,993,755,097.60
  5. Step 5: Solve for x
    x = 273,993,755,097.60/442,891.20
  6. Step 6: Final answer
    x = 618,648

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.