Home / 1,434.12-1,989.14-1,375.80

Finding the Fourth Proportional to 1,434.12, 1,989.14 and 1,375.80

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Solution

The fourth proportional to 1,434.12, 1,989.14 and 1,375.80 is: 1,908.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.12 : 1,989.14 = 1,375.80 : x
  2. Step 2: Convert to fraction form
    1,434.12/1,989.14 = 1,375.80/x
  3. Step 3: Cross multiply
    1,434.12x = 1,989.14 × 1,375.80
  4. Step 4: Simplify right side
    1,434.12x = 2,736,658.81
  5. Step 5: Solve for x
    x = 2,736,658.81/1,434.12
  6. Step 6: Final answer
    x = 1,908.25

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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.