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Finding the Fourth Proportional to 928.17, 1,279.79 and 741.06

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Solution

The fourth proportional to 928.17, 1,279.79 and 741.06 is: 1,021.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.17 : 1,279.79 = 741.06 : x
  2. Step 2: Convert to fraction form
    928.17/1,279.79 = 741.06/x
  3. Step 3: Cross multiply
    928.17x = 1,279.79 × 741.06
  4. Step 4: Simplify right side
    928.17x = 948,407.83
  5. Step 5: Solve for x
    x = 948,407.83/928.17
  6. Step 6: Final answer
    x = 1,021.80

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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.