Home / 1,369.16-2,043.05-1,221.90

Finding the Fourth Proportional to 1,369.16, 2,043.05 and 1,221.90

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Solution

The fourth proportional to 1,369.16, 2,043.05 and 1,221.90 is: 1,823.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.16 : 2,043.05 = 1,221.90 : x
  2. Step 2: Convert to fraction form
    1,369.16/2,043.05 = 1,221.90/x
  3. Step 3: Cross multiply
    1,369.16x = 2,043.05 × 1,221.90
  4. Step 4: Simplify right side
    1,369.16x = 2,496,402.80
  5. Step 5: Solve for x
    x = 2,496,402.80/1,369.16
  6. Step 6: Final answer
    x = 1,823.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.