Home / 1,426.16-2,139.29-438.89

Finding the Fourth Proportional to 1,426.16, 2,139.29 and 438.89

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Solution

The fourth proportional to 1,426.16, 2,139.29 and 438.89 is: 658.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.16 : 2,139.29 = 438.89 : x
  2. Step 2: Convert to fraction form
    1,426.16/2,139.29 = 438.89/x
  3. Step 3: Cross multiply
    1,426.16x = 2,139.29 × 438.89
  4. Step 4: Simplify right side
    1,426.16x = 938,919.43
  5. Step 5: Solve for x
    x = 938,919.43/1,426.16
  6. Step 6: Final answer
    x = 658.36

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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.