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Finding the Fourth Proportional to 1,031.95, 1,540.43 and 955.81

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Solution

The fourth proportional to 1,031.95, 1,540.43 and 955.81 is: 1,426.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.95 : 1,540.43 = 955.81 : x
  2. Step 2: Convert to fraction form
    1,031.95/1,540.43 = 955.81/x
  3. Step 3: Cross multiply
    1,031.95x = 1,540.43 × 955.81
  4. Step 4: Simplify right side
    1,031.95x = 1,472,358.40
  5. Step 5: Solve for x
    x = 1,472,358.40/1,031.95
  6. Step 6: Final answer
    x = 1,426.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.