Home / 1,434.21-2,147.26-912.92

Finding the Fourth Proportional to 1,434.21, 2,147.26 and 912.92

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Solution

The fourth proportional to 1,434.21, 2,147.26 and 912.92 is: 1,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.21 : 2,147.26 = 912.92 : x
  2. Step 2: Convert to fraction form
    1,434.21/2,147.26 = 912.92/x
  3. Step 3: Cross multiply
    1,434.21x = 2,147.26 × 912.92
  4. Step 4: Simplify right side
    1,434.21x = 1,960,276.60
  5. Step 5: Solve for x
    x = 1,960,276.60/1,434.21
  6. Step 6: Final answer
    x = 1,366.80

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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.