Home / 1,538.06-2,118.15-1,257.39

Finding the Fourth Proportional to 1,538.06, 2,118.15 and 1,257.39

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Solution

The fourth proportional to 1,538.06, 2,118.15 and 1,257.39 is: 1,731.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.06 : 2,118.15 = 1,257.39 : x
  2. Step 2: Convert to fraction form
    1,538.06/2,118.15 = 1,257.39/x
  3. Step 3: Cross multiply
    1,538.06x = 2,118.15 × 1,257.39
  4. Step 4: Simplify right side
    1,538.06x = 2,663,340.63
  5. Step 5: Solve for x
    x = 2,663,340.63/1,538.06
  6. Step 6: Final answer
    x = 1,731.63

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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.