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Finding the Fourth Proportional to 746.32, 1,118.72 and 283.68

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Solution

The fourth proportional to 746.32, 1,118.72 and 283.68 is: 425.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.32 : 1,118.72 = 283.68 : x
  2. Step 2: Convert to fraction form
    746.32/1,118.72 = 283.68/x
  3. Step 3: Cross multiply
    746.32x = 1,118.72 × 283.68
  4. Step 4: Simplify right side
    746.32x = 317,358.49
  5. Step 5: Solve for x
    x = 317,358.49/746.32
  6. Step 6: Final answer
    x = 425.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.