Home / 1,535.72-2,119.51-938.55

Finding the Fourth Proportional to 1,535.72, 2,119.51 and 938.55

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Solution

The fourth proportional to 1,535.72, 2,119.51 and 938.55 is: 1,295.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.72 : 2,119.51 = 938.55 : x
  2. Step 2: Convert to fraction form
    1,535.72/2,119.51 = 938.55/x
  3. Step 3: Cross multiply
    1,535.72x = 2,119.51 × 938.55
  4. Step 4: Simplify right side
    1,535.72x = 1,989,275.23
  5. Step 5: Solve for x
    x = 1,989,275.23/1,535.72
  6. Step 6: Final answer
    x = 1,295.34

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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.