Home / 1,425.39-2,133.77-1,317.39

Finding the Fourth Proportional to 1,425.39, 2,133.77 and 1,317.39

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Solution

The fourth proportional to 1,425.39, 2,133.77 and 1,317.39 is: 1,972.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.39 : 2,133.77 = 1,317.39 : x
  2. Step 2: Convert to fraction form
    1,425.39/2,133.77 = 1,317.39/x
  3. Step 3: Cross multiply
    1,425.39x = 2,133.77 × 1,317.39
  4. Step 4: Simplify right side
    1,425.39x = 2,811,000.67
  5. Step 5: Solve for x
    x = 2,811,000.67/1,425.39
  6. Step 6: Final answer
    x = 1,972.09

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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.