Home / 1,542.35-2,127.71-912.46

Finding the Fourth Proportional to 1,542.35, 2,127.71 and 912.46

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Solution

The fourth proportional to 1,542.35, 2,127.71 and 912.46 is: 1,258.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.35 : 2,127.71 = 912.46 : x
  2. Step 2: Convert to fraction form
    1,542.35/2,127.71 = 912.46/x
  3. Step 3: Cross multiply
    1,542.35x = 2,127.71 × 912.46
  4. Step 4: Simplify right side
    1,542.35x = 1,941,450.27
  5. Step 5: Solve for x
    x = 1,941,450.27/1,542.35
  6. Step 6: Final answer
    x = 1,258.76

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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.