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Finding the Fourth Proportional to 2,658.55, 3,985.25 and 1,489.12

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Solution

The fourth proportional to 2,658.55, 3,985.25 and 1,489.12 is: 2,232.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.55 : 3,985.25 = 1,489.12 : x
  2. Step 2: Convert to fraction form
    2,658.55/3,985.25 = 1,489.12/x
  3. Step 3: Cross multiply
    2,658.55x = 3,985.25 × 1,489.12
  4. Step 4: Simplify right side
    2,658.55x = 5,934,515.48
  5. Step 5: Solve for x
    x = 5,934,515.48/2,658.55
  6. Step 6: Final answer
    x = 2,232.24

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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.