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Finding the Fourth Proportional to 935.88, 1,290.76 and 726.69

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Solution

The fourth proportional to 935.88, 1,290.76 and 726.69 is: 1,002.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.88 : 1,290.76 = 726.69 : x
  2. Step 2: Convert to fraction form
    935.88/1,290.76 = 726.69/x
  3. Step 3: Cross multiply
    935.88x = 1,290.76 × 726.69
  4. Step 4: Simplify right side
    935.88x = 937,982.38
  5. Step 5: Solve for x
    x = 937,982.38/935.88
  6. Step 6: Final answer
    x = 1,002.25

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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.