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Finding the Fourth Proportional to 942.43, 1,300.21 and 528.43

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Solution

The fourth proportional to 942.43, 1,300.21 and 528.43 is: 729.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.43 : 1,300.21 = 528.43 : x
  2. Step 2: Convert to fraction form
    942.43/1,300.21 = 528.43/x
  3. Step 3: Cross multiply
    942.43x = 1,300.21 × 528.43
  4. Step 4: Simplify right side
    942.43x = 687,069.97
  5. Step 5: Solve for x
    x = 687,069.97/942.43
  6. Step 6: Final answer
    x = 729.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.