Home / 1,279.11-1,916.84-630.30

Finding the Fourth Proportional to 1,279.11, 1,916.84 and 630.30

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Solution

The fourth proportional to 1,279.11, 1,916.84 and 630.30 is: 944.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.11 : 1,916.84 = 630.30 : x
  2. Step 2: Convert to fraction form
    1,279.11/1,916.84 = 630.30/x
  3. Step 3: Cross multiply
    1,279.11x = 1,916.84 × 630.30
  4. Step 4: Simplify right side
    1,279.11x = 1,208,185.83
  5. Step 5: Solve for x
    x = 1,208,185.83/1,279.11
  6. Step 6: Final answer
    x = 944.55

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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.