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Finding the Fourth Proportional to 786.49, 1,179.33 and 266.26

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Solution

The fourth proportional to 786.49, 1,179.33 and 266.26 is: 399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.49 : 1,179.33 = 266.26 : x
  2. Step 2: Convert to fraction form
    786.49/1,179.33 = 266.26/x
  3. Step 3: Cross multiply
    786.49x = 1,179.33 × 266.26
  4. Step 4: Simplify right side
    786.49x = 314,008.41
  5. Step 5: Solve for x
    x = 314,008.41/786.49
  6. Step 6: Final answer
    x = 399.25

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Double scale
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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.