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Finding the Fourth Proportional to 2,439.30, 3,658.49 and 660.33

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Solution

The fourth proportional to 2,439.30, 3,658.49 and 660.33 is: 990.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,439.30 : 3,658.49 = 660.33 : x
  2. Step 2: Convert to fraction form
    2,439.30/3,658.49 = 660.33/x
  3. Step 3: Cross multiply
    2,439.30x = 3,658.49 × 660.33
  4. Step 4: Simplify right side
    2,439.30x = 2,415,807.40
  5. Step 5: Solve for x
    x = 2,415,807.40/2,439.30
  6. Step 6: Final answer
    x = 990.37

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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.