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Finding the Fourth Proportional to 752.36, 1,127.86 and 290.45

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Solution

The fourth proportional to 752.36, 1,127.86 and 290.45 is: 435.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.36 : 1,127.86 = 290.45 : x
  2. Step 2: Convert to fraction form
    752.36/1,127.86 = 290.45/x
  3. Step 3: Cross multiply
    752.36x = 1,127.86 × 290.45
  4. Step 4: Simplify right side
    752.36x = 327,585.50
  5. Step 5: Solve for x
    x = 327,585.50/752.36
  6. Step 6: Final answer
    x = 435.41

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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.