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Finding the Fourth Proportional to 1,540, 2,125.16 and 910.56

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Solution

The fourth proportional to 1,540, 2,125.16 and 910.56 is: 1,256.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540 : 2,125.16 = 910.56 : x
  2. Step 2: Convert to fraction form
    1,540/2,125.16 = 910.56/x
  3. Step 3: Cross multiply
    1,540x = 2,125.16 × 910.56
  4. Step 4: Simplify right side
    1,540x = 1,935,085.69
  5. Step 5: Solve for x
    x = 1,935,085.69/1,540
  6. Step 6: Final answer
    x = 1,256.55

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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.