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Finding the Fourth Proportional to 799.58, 1,103.40 and 776.00

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Solution

The fourth proportional to 799.58, 1,103.40 and 776.00 is: 1,070.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.58 : 1,103.40 = 776.00 : x
  2. Step 2: Convert to fraction form
    799.58/1,103.40 = 776.00/x
  3. Step 3: Cross multiply
    799.58x = 1,103.40 × 776.00
  4. Step 4: Simplify right side
    799.58x = 856,241.16
  5. Step 5: Solve for x
    x = 856,241.16/799.58
  6. Step 6: Final answer
    x = 1,070.86

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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.