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Finding the Fourth Proportional to 752.58, 1,128.95 and 204.77

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Solution

The fourth proportional to 752.58, 1,128.95 and 204.77 is: 307.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.58 : 1,128.95 = 204.77 : x
  2. Step 2: Convert to fraction form
    752.58/1,128.95 = 204.77/x
  3. Step 3: Cross multiply
    752.58x = 1,128.95 × 204.77
  4. Step 4: Simplify right side
    752.58x = 231,175.09
  5. Step 5: Solve for x
    x = 231,175.09/752.58
  6. Step 6: Final answer
    x = 307.18

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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.