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Finding the Fourth Proportional to 752.08, 1,128.71 and 522.58

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Solution

The fourth proportional to 752.08, 1,128.71 and 522.58 is: 784.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.08 : 1,128.71 = 522.58 : x
  2. Step 2: Convert to fraction form
    752.08/1,128.71 = 522.58/x
  3. Step 3: Cross multiply
    752.08x = 1,128.71 × 522.58
  4. Step 4: Simplify right side
    752.08x = 589,841.27
  5. Step 5: Solve for x
    x = 589,841.27/752.08
  6. Step 6: Final answer
    x = 784.28

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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.