Home / 1,538.40-2,124.45-1,258.95

Finding the Fourth Proportional to 1,538.40, 2,124.45 and 1,258.95

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Solution

The fourth proportional to 1,538.40, 2,124.45 and 1,258.95 is: 1,738.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.40 : 2,124.45 = 1,258.95 : x
  2. Step 2: Convert to fraction form
    1,538.40/2,124.45 = 1,258.95/x
  3. Step 3: Cross multiply
    1,538.40x = 2,124.45 × 1,258.95
  4. Step 4: Simplify right side
    1,538.40x = 2,674,576.33
  5. Step 5: Solve for x
    x = 2,674,576.33/1,538.40
  6. Step 6: Final answer
    x = 1,738.54

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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.