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Finding the Fourth Proportional to 1,540.38, 2,125.65 and 877.26

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Solution

The fourth proportional to 1,540.38, 2,125.65 and 877.26 is: 1,210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.38 : 2,125.65 = 877.26 : x
  2. Step 2: Convert to fraction form
    1,540.38/2,125.65 = 877.26/x
  3. Step 3: Cross multiply
    1,540.38x = 2,125.65 × 877.26
  4. Step 4: Simplify right side
    1,540.38x = 1,864,747.72
  5. Step 5: Solve for x
    x = 1,864,747.72/1,540.38
  6. Step 6: Final answer
    x = 1,210.58

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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.