Home / 1,209.22-1,665.75-1,031.61

Finding the Fourth Proportional to 1,209.22, 1,665.75 and 1,031.61

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Solution

The fourth proportional to 1,209.22, 1,665.75 and 1,031.61 is: 1,421.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.22 : 1,665.75 = 1,031.61 : x
  2. Step 2: Convert to fraction form
    1,209.22/1,665.75 = 1,031.61/x
  3. Step 3: Cross multiply
    1,209.22x = 1,665.75 × 1,031.61
  4. Step 4: Simplify right side
    1,209.22x = 1,718,404.36
  5. Step 5: Solve for x
    x = 1,718,404.36/1,209.22
  6. Step 6: Final answer
    x = 1,421.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.