Home / 1,528.42-2,108.14-939.28

Finding the Fourth Proportional to 1,528.42, 2,108.14 and 939.28

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Solution

The fourth proportional to 1,528.42, 2,108.14 and 939.28 is: 1,295.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.42 : 2,108.14 = 939.28 : x
  2. Step 2: Convert to fraction form
    1,528.42/2,108.14 = 939.28/x
  3. Step 3: Cross multiply
    1,528.42x = 2,108.14 × 939.28
  4. Step 4: Simplify right side
    1,528.42x = 1,980,133.74
  5. Step 5: Solve for x
    x = 1,980,133.74/1,528.42
  6. Step 6: Final answer
    x = 1,295.54

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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.