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Finding the Fourth Proportional to 752.19, 1,128.63 and 335.83

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Solution

The fourth proportional to 752.19, 1,128.63 and 335.83 is: 503.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.19 : 1,128.63 = 335.83 : x
  2. Step 2: Convert to fraction form
    752.19/1,128.63 = 335.83/x
  3. Step 3: Cross multiply
    752.19x = 1,128.63 × 335.83
  4. Step 4: Simplify right side
    752.19x = 379,027.81
  5. Step 5: Solve for x
    x = 379,027.81/752.19
  6. Step 6: Final answer
    x = 503.90

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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.