Home / 1,426.17-2,139.24-438.98

Finding the Fourth Proportional to 1,426.17, 2,139.24 and 438.98

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Solution

The fourth proportional to 1,426.17, 2,139.24 and 438.98 is: 658.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.17 : 2,139.24 = 438.98 : x
  2. Step 2: Convert to fraction form
    1,426.17/2,139.24 = 438.98/x
  3. Step 3: Cross multiply
    1,426.17x = 2,139.24 × 438.98
  4. Step 4: Simplify right side
    1,426.17x = 939,083.58
  5. Step 5: Solve for x
    x = 939,083.58/1,426.17
  6. Step 6: Final answer
    x = 658.47

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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.