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Finding the Fourth Proportional to 737.80, 1,018.28 and 486.46

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Solution

The fourth proportional to 737.80, 1,018.28 and 486.46 is: 671.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.80 : 1,018.28 = 486.46 : x
  2. Step 2: Convert to fraction form
    737.80/1,018.28 = 486.46/x
  3. Step 3: Cross multiply
    737.80x = 1,018.28 × 486.46
  4. Step 4: Simplify right side
    737.80x = 495,352.49
  5. Step 5: Solve for x
    x = 495,352.49/737.80
  6. Step 6: Final answer
    x = 671.39

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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.