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Finding the Fourth Proportional to 746.68, 1,118.28 and 380.32

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Solution

The fourth proportional to 746.68, 1,118.28 and 380.32 is: 569.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.68 : 1,118.28 = 380.32 : x
  2. Step 2: Convert to fraction form
    746.68/1,118.28 = 380.32/x
  3. Step 3: Cross multiply
    746.68x = 1,118.28 × 380.32
  4. Step 4: Simplify right side
    746.68x = 425,304.25
  5. Step 5: Solve for x
    x = 425,304.25/746.68
  6. Step 6: Final answer
    x = 569.59

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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.