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Finding the Fourth Proportional to 786.76, 1,084.26 and 576.76

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Solution

The fourth proportional to 786.76, 1,084.26 and 576.76 is: 794.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.76 : 1,084.26 = 576.76 : x
  2. Step 2: Convert to fraction form
    786.76/1,084.26 = 576.76/x
  3. Step 3: Cross multiply
    786.76x = 1,084.26 × 576.76
  4. Step 4: Simplify right side
    786.76x = 625,357.80
  5. Step 5: Solve for x
    x = 625,357.80/786.76
  6. Step 6: Final answer
    x = 794.85

Related Problems

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Half scale
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Double scale
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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.