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Finding the Fourth Proportional to 959.40, 1,325.70 and 726.12

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Solution

The fourth proportional to 959.40, 1,325.70 and 726.12 is: 1,003.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.40 : 1,325.70 = 726.12 : x
  2. Step 2: Convert to fraction form
    959.40/1,325.70 = 726.12/x
  3. Step 3: Cross multiply
    959.40x = 1,325.70 × 726.12
  4. Step 4: Simplify right side
    959.40x = 962,617.28
  5. Step 5: Solve for x
    x = 962,617.28/959.40
  6. Step 6: Final answer
    x = 1,003.35

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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.