Home / 1,901.28-2,851.86-1,126.64

Finding the Fourth Proportional to 1,901.28, 2,851.86 and 1,126.64

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Solution

The fourth proportional to 1,901.28, 2,851.86 and 1,126.64 is: 1,689.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,901.28 : 2,851.86 = 1,126.64 : x
  2. Step 2: Convert to fraction form
    1,901.28/2,851.86 = 1,126.64/x
  3. Step 3: Cross multiply
    1,901.28x = 2,851.86 × 1,126.64
  4. Step 4: Simplify right side
    1,901.28x = 3,213,019.55
  5. Step 5: Solve for x
    x = 3,213,019.55/1,901.28
  6. Step 6: Final answer
    x = 1,689.92

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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.