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Finding the Fourth Proportional to 2,488.30, 3,732.45 and 639.42

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Solution

The fourth proportional to 2,488.30, 3,732.45 and 639.42 is: 959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,488.30 : 3,732.45 = 639.42 : x
  2. Step 2: Convert to fraction form
    2,488.30/3,732.45 = 639.42/x
  3. Step 3: Cross multiply
    2,488.30x = 3,732.45 × 639.42
  4. Step 4: Simplify right side
    2,488.30x = 2,386,603.18
  5. Step 5: Solve for x
    x = 2,386,603.18/2,488.30
  6. Step 6: Final answer
    x = 959.13

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1.5x scale

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.