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Finding the Fourth Proportional to 1,031.38, 1,422.53 and 682.58

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Solution

The fourth proportional to 1,031.38, 1,422.53 and 682.58 is: 941.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.38 : 1,422.53 = 682.58 : x
  2. Step 2: Convert to fraction form
    1,031.38/1,422.53 = 682.58/x
  3. Step 3: Cross multiply
    1,031.38x = 1,422.53 × 682.58
  4. Step 4: Simplify right side
    1,031.38x = 970,990.53
  5. Step 5: Solve for x
    x = 970,990.53/1,031.38
  6. Step 6: Final answer
    x = 941.45

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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.