Home / 1,266.14-1,746.80-768.60

Finding the Fourth Proportional to 1,266.14, 1,746.80 and 768.60

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Solution

The fourth proportional to 1,266.14, 1,746.80 and 768.60 is: 1,060.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.14 : 1,746.80 = 768.60 : x
  2. Step 2: Convert to fraction form
    1,266.14/1,746.80 = 768.60/x
  3. Step 3: Cross multiply
    1,266.14x = 1,746.80 × 768.60
  4. Step 4: Simplify right side
    1,266.14x = 1,342,590.48
  5. Step 5: Solve for x
    x = 1,342,590.48/1,266.14
  6. Step 6: Final answer
    x = 1,060.38

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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.