Home / 1,557.19-2,148.78-967.90

Finding the Fourth Proportional to 1,557.19, 2,148.78 and 967.90

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Solution

The fourth proportional to 1,557.19, 2,148.78 and 967.90 is: 1,335.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.19 : 2,148.78 = 967.90 : x
  2. Step 2: Convert to fraction form
    1,557.19/2,148.78 = 967.90/x
  3. Step 3: Cross multiply
    1,557.19x = 2,148.78 × 967.90
  4. Step 4: Simplify right side
    1,557.19x = 2,079,804.16
  5. Step 5: Solve for x
    x = 2,079,804.16/1,557.19
  6. Step 6: Final answer
    x = 1,335.61

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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.