Home / 1,425.30-2,138.00-424.55

Finding the Fourth Proportional to 1,425.30, 2,138.00 and 424.55

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Solution

The fourth proportional to 1,425.30, 2,138.00 and 424.55 is: 636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.30 : 2,138.00 = 424.55 : x
  2. Step 2: Convert to fraction form
    1,425.30/2,138.00 = 424.55/x
  3. Step 3: Cross multiply
    1,425.30x = 2,138.00 × 424.55
  4. Step 4: Simplify right side
    1,425.30x = 907,685.11
  5. Step 5: Solve for x
    x = 907,685.11/1,425.30
  6. Step 6: Final answer
    x = 636.84

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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.