Home / 1,427.17-2,139.29-695.85

Finding the Fourth Proportional to 1,427.17, 2,139.29 and 695.85

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Solution

The fourth proportional to 1,427.17, 2,139.29 and 695.85 is: 1,043.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.17 : 2,139.29 = 695.85 : x
  2. Step 2: Convert to fraction form
    1,427.17/2,139.29 = 695.85/x
  3. Step 3: Cross multiply
    1,427.17x = 2,139.29 × 695.85
  4. Step 4: Simplify right side
    1,427.17x = 1,488,624.95
  5. Step 5: Solve for x
    x = 1,488,624.95/1,427.17
  6. Step 6: Final answer
    x = 1,043.06

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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.