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Finding the Fourth Proportional to 959.37, 1,320.64 and 749.17

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Solution

The fourth proportional to 959.37, 1,320.64 and 749.17 is: 1,031.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.37 : 1,320.64 = 749.17 : x
  2. Step 2: Convert to fraction form
    959.37/1,320.64 = 749.17/x
  3. Step 3: Cross multiply
    959.37x = 1,320.64 × 749.17
  4. Step 4: Simplify right side
    959.37x = 989,383.87
  5. Step 5: Solve for x
    x = 989,383.87/959.37
  6. Step 6: Final answer
    x = 1,031.28

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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.