Home / 1,695.38-2,339.51-939.15

Finding the Fourth Proportional to 1,695.38, 2,339.51 and 939.15

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Solution

The fourth proportional to 1,695.38, 2,339.51 and 939.15 is: 1,295.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.38 : 2,339.51 = 939.15 : x
  2. Step 2: Convert to fraction form
    1,695.38/2,339.51 = 939.15/x
  3. Step 3: Cross multiply
    1,695.38x = 2,339.51 × 939.15
  4. Step 4: Simplify right side
    1,695.38x = 2,197,146.12
  5. Step 5: Solve for x
    x = 2,197,146.12/1,695.38
  6. Step 6: Final answer
    x = 1,295.96

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1.5x scale

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.