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Finding the Fourth Proportional to 1,540.15, 2,125.46 and 876.99

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Solution

The fourth proportional to 1,540.15, 2,125.46 and 876.99 is: 1,210.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.15 : 2,125.46 = 876.99 : x
  2. Step 2: Convert to fraction form
    1,540.15/2,125.46 = 876.99/x
  3. Step 3: Cross multiply
    1,540.15x = 2,125.46 × 876.99
  4. Step 4: Simplify right side
    1,540.15x = 1,864,007.17
  5. Step 5: Solve for x
    x = 1,864,007.17/1,540.15
  6. Step 6: Final answer
    x = 1,210.28

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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.