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Finding the Fourth Proportional to 752.16, 1,037.76 and 472.32

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Solution

The fourth proportional to 752.16, 1,037.76 and 472.32 is: 651.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.16 : 1,037.76 = 472.32 : x
  2. Step 2: Convert to fraction form
    752.16/1,037.76 = 472.32/x
  3. Step 3: Cross multiply
    752.16x = 1,037.76 × 472.32
  4. Step 4: Simplify right side
    752.16x = 490,154.80
  5. Step 5: Solve for x
    x = 490,154.80/752.16
  6. Step 6: Final answer
    x = 651.66

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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.