Home / 1,528.44-2,108.12-939.28

Finding the Fourth Proportional to 1,528.44, 2,108.12 and 939.28

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Solution

The fourth proportional to 1,528.44, 2,108.12 and 939.28 is: 1,295.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.44 : 2,108.12 = 939.28 : x
  2. Step 2: Convert to fraction form
    1,528.44/2,108.12 = 939.28/x
  3. Step 3: Cross multiply
    1,528.44x = 2,108.12 × 939.28
  4. Step 4: Simplify right side
    1,528.44x = 1,980,114.95
  5. Step 5: Solve for x
    x = 1,980,114.95/1,528.44
  6. Step 6: Final answer
    x = 1,295.51

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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.