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Finding the Fourth Proportional to 752.18, 1,037.72 and 486.56

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Solution

The fourth proportional to 752.18, 1,037.72 and 486.56 is: 671.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.18 : 1,037.72 = 486.56 : x
  2. Step 2: Convert to fraction form
    752.18/1,037.72 = 486.56/x
  3. Step 3: Cross multiply
    752.18x = 1,037.72 × 486.56
  4. Step 4: Simplify right side
    752.18x = 504,916.85
  5. Step 5: Solve for x
    x = 504,916.85/752.18
  6. Step 6: Final answer
    x = 671.28

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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.