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Finding the Fourth Proportional to 418,639.30, 627,266.40 and 240,836.20

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Solution

The fourth proportional to 418,639.30, 627,266.40 and 240,836.20 is: 360,855.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,639.30 : 627,266.40 = 240,836.20 : x
  2. Step 2: Convert to fraction form
    418,639.30/627,266.40 = 240,836.20/x
  3. Step 3: Cross multiply
    418,639.30x = 627,266.40 × 240,836.20
  4. Step 4: Simplify right side
    418,639.30x = 151,068,456,163.68
  5. Step 5: Solve for x
    x = 151,068,456,163.68/418,639.30
  6. Step 6: Final answer
    x = 360,855.89

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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.