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Finding the Fourth Proportional to 737.76, 1,019.20 and 486.28

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Solution

The fourth proportional to 737.76, 1,019.20 and 486.28 is: 671.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.76 : 1,019.20 = 486.28 : x
  2. Step 2: Convert to fraction form
    737.76/1,019.20 = 486.28/x
  3. Step 3: Cross multiply
    737.76x = 1,019.20 × 486.28
  4. Step 4: Simplify right side
    737.76x = 495,616.58
  5. Step 5: Solve for x
    x = 495,616.58/737.76
  6. Step 6: Final answer
    x = 671.79

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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.