Home / 1,433.12-1,987.76-1,374.80

Finding the Fourth Proportional to 1,433.12, 1,987.76 and 1,374.80

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Solution

The fourth proportional to 1,433.12, 1,987.76 and 1,374.80 is: 1,906.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433.12 : 1,987.76 = 1,374.80 : x
  2. Step 2: Convert to fraction form
    1,433.12/1,987.76 = 1,374.80/x
  3. Step 3: Cross multiply
    1,433.12x = 1,987.76 × 1,374.80
  4. Step 4: Simplify right side
    1,433.12x = 2,732,772.45
  5. Step 5: Solve for x
    x = 2,732,772.45/1,433.12
  6. Step 6: Final answer
    x = 1,906.87

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.