Home / 1,426.53-2,139.39-439.05

Finding the Fourth Proportional to 1,426.53, 2,139.39 and 439.05

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Solution

The fourth proportional to 1,426.53, 2,139.39 and 439.05 is: 658.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.53 : 2,139.39 = 439.05 : x
  2. Step 2: Convert to fraction form
    1,426.53/2,139.39 = 439.05/x
  3. Step 3: Cross multiply
    1,426.53x = 2,139.39 × 439.05
  4. Step 4: Simplify right side
    1,426.53x = 939,299.18
  5. Step 5: Solve for x
    x = 939,299.18/1,426.53
  6. Step 6: Final answer
    x = 658.45

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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.