Home / 1,425.25-2,138.24-399.25

Finding the Fourth Proportional to 1,425.25, 2,138.24 and 399.25

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Solution

The fourth proportional to 1,425.25, 2,138.24 and 399.25 is: 598.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.25 : 2,138.24 = 399.25 : x
  2. Step 2: Convert to fraction form
    1,425.25/2,138.24 = 399.25/x
  3. Step 3: Cross multiply
    1,425.25x = 2,138.24 × 399.25
  4. Step 4: Simplify right side
    1,425.25x = 853,692.32
  5. Step 5: Solve for x
    x = 853,692.32/1,425.25
  6. Step 6: Final answer
    x = 598.98

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1.5x scale

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.