Home / 1,266.08-1,747.31-768.85

Finding the Fourth Proportional to 1,266.08, 1,747.31 and 768.85

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Solution

The fourth proportional to 1,266.08, 1,747.31 and 768.85 is: 1,061.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.08 : 1,747.31 = 768.85 : x
  2. Step 2: Convert to fraction form
    1,266.08/1,747.31 = 768.85/x
  3. Step 3: Cross multiply
    1,266.08x = 1,747.31 × 768.85
  4. Step 4: Simplify right side
    1,266.08x = 1,343,406.71
  5. Step 5: Solve for x
    x = 1,343,406.71/1,266.08
  6. Step 6: Final answer
    x = 1,061.08

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1.5x scale

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.