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Finding the Fourth Proportional to 2,489.88, 3,434.70 and 1,545.08

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Solution

The fourth proportional to 2,489.88, 3,434.70 and 1,545.08 is: 2,131.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.88 : 3,434.70 = 1,545.08 : x
  2. Step 2: Convert to fraction form
    2,489.88/3,434.70 = 1,545.08/x
  3. Step 3: Cross multiply
    2,489.88x = 3,434.70 × 1,545.08
  4. Step 4: Simplify right side
    2,489.88x = 5,306,886.28
  5. Step 5: Solve for x
    x = 5,306,886.28/2,489.88
  6. Step 6: Final answer
    x = 2,131.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.