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Finding the Fourth Proportional to 925.81, 1,276.14 and 630.58

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Solution

The fourth proportional to 925.81, 1,276.14 and 630.58 is: 869.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.81 : 1,276.14 = 630.58 : x
  2. Step 2: Convert to fraction form
    925.81/1,276.14 = 630.58/x
  3. Step 3: Cross multiply
    925.81x = 1,276.14 × 630.58
  4. Step 4: Simplify right side
    925.81x = 804,708.36
  5. Step 5: Solve for x
    x = 804,708.36/925.81
  6. Step 6: Final answer
    x = 869.19

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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.