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Finding the Fourth Proportional to 970.92, 1,339.44 and 749.46

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Solution

The fourth proportional to 970.92, 1,339.44 and 749.46 is: 1,033.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.92 : 1,339.44 = 749.46 : x
  2. Step 2: Convert to fraction form
    970.92/1,339.44 = 749.46/x
  3. Step 3: Cross multiply
    970.92x = 1,339.44 × 749.46
  4. Step 4: Simplify right side
    970.92x = 1,003,856.70
  5. Step 5: Solve for x
    x = 1,003,856.70/970.92
  6. Step 6: Final answer
    x = 1,033.92

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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.