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Finding the Fourth Proportional to 743.32, 1,023.49 and 660.28

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Solution

The fourth proportional to 743.32, 1,023.49 and 660.28 is: 909.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.32 : 1,023.49 = 660.28 : x
  2. Step 2: Convert to fraction form
    743.32/1,023.49 = 660.28/x
  3. Step 3: Cross multiply
    743.32x = 1,023.49 × 660.28
  4. Step 4: Simplify right side
    743.32x = 675,789.98
  5. Step 5: Solve for x
    x = 675,789.98/743.32
  6. Step 6: Final answer
    x = 909.15

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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.