Home / 1,265.20-1,895.88-615.76

Finding the Fourth Proportional to 1,265.20, 1,895.88 and 615.76

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Solution

The fourth proportional to 1,265.20, 1,895.88 and 615.76 is: 922.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.20 : 1,895.88 = 615.76 : x
  2. Step 2: Convert to fraction form
    1,265.20/1,895.88 = 615.76/x
  3. Step 3: Cross multiply
    1,265.20x = 1,895.88 × 615.76
  4. Step 4: Simplify right side
    1,265.20x = 1,167,407.07
  5. Step 5: Solve for x
    x = 1,167,407.07/1,265.20
  6. Step 6: Final answer
    x = 922.71

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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.