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Finding the Fourth Proportional to 2,758.72, 4,138.08 and 810.72

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Solution

The fourth proportional to 2,758.72, 4,138.08 and 810.72 is: 1,216.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.72 : 4,138.08 = 810.72 : x
  2. Step 2: Convert to fraction form
    2,758.72/4,138.08 = 810.72/x
  3. Step 3: Cross multiply
    2,758.72x = 4,138.08 × 810.72
  4. Step 4: Simplify right side
    2,758.72x = 3,354,824.22
  5. Step 5: Solve for x
    x = 3,354,824.22/2,758.72
  6. Step 6: Final answer
    x = 1,216.08

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1.5x scale

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.