Home / 1,426.18-2,139.28-695.56

Finding the Fourth Proportional to 1,426.18, 2,139.28 and 695.56

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Solution

The fourth proportional to 1,426.18, 2,139.28 and 695.56 is: 1,043.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.18 : 2,139.28 = 695.56 : x
  2. Step 2: Convert to fraction form
    1,426.18/2,139.28 = 695.56/x
  3. Step 3: Cross multiply
    1,426.18x = 2,139.28 × 695.56
  4. Step 4: Simplify right side
    1,426.18x = 1,487,997.60
  5. Step 5: Solve for x
    x = 1,487,997.60/1,426.18
  6. Step 6: Final answer
    x = 1,043.34

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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.