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Finding the Fourth Proportional to 776.40, 1,064.85 and 736.82

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Solution

The fourth proportional to 776.40, 1,064.85 and 736.82 is: 1,010.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.40 : 1,064.85 = 736.82 : x
  2. Step 2: Convert to fraction form
    776.40/1,064.85 = 736.82/x
  3. Step 3: Cross multiply
    776.40x = 1,064.85 × 736.82
  4. Step 4: Simplify right side
    776.40x = 784,597.45
  5. Step 5: Solve for x
    x = 784,597.45/776.40
  6. Step 6: Final answer
    x = 1,010.56

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.