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Finding the Fourth Proportional to 752.34, 1,128.51 and 367.50

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Solution

The fourth proportional to 752.34, 1,128.51 and 367.50 is: 551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.34 : 1,128.51 = 367.50 : x
  2. Step 2: Convert to fraction form
    752.34/1,128.51 = 367.50/x
  3. Step 3: Cross multiply
    752.34x = 1,128.51 × 367.50
  4. Step 4: Simplify right side
    752.34x = 414,727.43
  5. Step 5: Solve for x
    x = 414,727.43/752.34
  6. Step 6: Final answer
    x = 551.25

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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.