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Finding the Fourth Proportional to 795.40, 1,091.12 and 761.80

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Solution

The fourth proportional to 795.40, 1,091.12 and 761.80 is: 1,045.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.40 : 1,091.12 = 761.80 : x
  2. Step 2: Convert to fraction form
    795.40/1,091.12 = 761.80/x
  3. Step 3: Cross multiply
    795.40x = 1,091.12 × 761.80
  4. Step 4: Simplify right side
    795.40x = 831,215.22
  5. Step 5: Solve for x
    x = 831,215.22/795.40
  6. Step 6: Final answer
    x = 1,045.03

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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.