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Finding the Fourth Proportional to 937.04, 1,294.26 and 643.28

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Solution

The fourth proportional to 937.04, 1,294.26 and 643.28 is: 888.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.04 : 1,294.26 = 643.28 : x
  2. Step 2: Convert to fraction form
    937.04/1,294.26 = 643.28/x
  3. Step 3: Cross multiply
    937.04x = 1,294.26 × 643.28
  4. Step 4: Simplify right side
    937.04x = 832,571.57
  5. Step 5: Solve for x
    x = 832,571.57/937.04
  6. Step 6: Final answer
    x = 888.51

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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.