Home / 1,299.11-1,792.85-1,211.63

Finding the Fourth Proportional to 1,299.11, 1,792.85 and 1,211.63

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Solution

The fourth proportional to 1,299.11, 1,792.85 and 1,211.63 is: 1,672.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.11 : 1,792.85 = 1,211.63 : x
  2. Step 2: Convert to fraction form
    1,299.11/1,792.85 = 1,211.63/x
  3. Step 3: Cross multiply
    1,299.11x = 1,792.85 × 1,211.63
  4. Step 4: Simplify right side
    1,299.11x = 2,172,264.79
  5. Step 5: Solve for x
    x = 2,172,264.79/1,299.11
  6. Step 6: Final answer
    x = 1,672.12

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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.