Home / 1,426.65-2,140.28-439.55

Finding the Fourth Proportional to 1,426.65, 2,140.28 and 439.55

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Solution

The fourth proportional to 1,426.65, 2,140.28 and 439.55 is: 659.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.65 : 2,140.28 = 439.55 : x
  2. Step 2: Convert to fraction form
    1,426.65/2,140.28 = 439.55/x
  3. Step 3: Cross multiply
    1,426.65x = 2,140.28 × 439.55
  4. Step 4: Simplify right side
    1,426.65x = 940,760.07
  5. Step 5: Solve for x
    x = 940,760.07/1,426.65
  6. Step 6: Final answer
    x = 659.42

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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.