Home / 1,426.58-2,140.20-439.35

Finding the Fourth Proportional to 1,426.58, 2,140.20 and 439.35

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Solution

The fourth proportional to 1,426.58, 2,140.20 and 439.35 is: 659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.58 : 2,140.20 = 439.35 : x
  2. Step 2: Convert to fraction form
    1,426.58/2,140.20 = 439.35/x
  3. Step 3: Cross multiply
    1,426.58x = 2,140.20 × 439.35
  4. Step 4: Simplify right side
    1,426.58x = 940,294.67
  5. Step 5: Solve for x
    x = 940,294.67/1,426.58
  6. Step 6: Final answer
    x = 659.13

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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.