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Finding the Fourth Proportional to 927.70, 1,279.74 and 752.74

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Solution

The fourth proportional to 927.70, 1,279.74 and 752.74 is: 1,038.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.70 : 1,279.74 = 752.74 : x
  2. Step 2: Convert to fraction form
    927.70/1,279.74 = 752.74/x
  3. Step 3: Cross multiply
    927.70x = 1,279.74 × 752.74
  4. Step 4: Simplify right side
    927.70x = 963,311.49
  5. Step 5: Solve for x
    x = 963,311.49/927.70
  6. Step 6: Final answer
    x = 1,038.39

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1.5x scale

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.