Home / 1,261.64-1,894.28-1,125.15

Finding the Fourth Proportional to 1,261.64, 1,894.28 and 1,125.15

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Solution

The fourth proportional to 1,261.64, 1,894.28 and 1,125.15 is: 1,689.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.64 : 1,894.28 = 1,125.15 : x
  2. Step 2: Convert to fraction form
    1,261.64/1,894.28 = 1,125.15/x
  3. Step 3: Cross multiply
    1,261.64x = 1,894.28 × 1,125.15
  4. Step 4: Simplify right side
    1,261.64x = 2,131,343.52
  5. Step 5: Solve for x
    x = 2,131,343.52/1,261.64
  6. Step 6: Final answer
    x = 1,689.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.