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Finding the Fourth Proportional to 962.88, 1,434.66 and 920.94

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Solution

The fourth proportional to 962.88, 1,434.66 and 920.94 is: 1,372.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.88 : 1,434.66 = 920.94 : x
  2. Step 2: Convert to fraction form
    962.88/1,434.66 = 920.94/x
  3. Step 3: Cross multiply
    962.88x = 1,434.66 × 920.94
  4. Step 4: Simplify right side
    962.88x = 1,321,235.78
  5. Step 5: Solve for x
    x = 1,321,235.78/962.88
  6. Step 6: Final answer
    x = 1,372.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.