Home / 1,279.08-1,916.10-1,003.80

Finding the Fourth Proportional to 1,279.08, 1,916.10 and 1,003.80

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Solution

The fourth proportional to 1,279.08, 1,916.10 and 1,003.80 is: 1,503.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.08 : 1,916.10 = 1,003.80 : x
  2. Step 2: Convert to fraction form
    1,279.08/1,916.10 = 1,003.80/x
  3. Step 3: Cross multiply
    1,279.08x = 1,916.10 × 1,003.80
  4. Step 4: Simplify right side
    1,279.08x = 1,923,381.18
  5. Step 5: Solve for x
    x = 1,923,381.18/1,279.08
  6. Step 6: Final answer
    x = 1,503.72

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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.