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Finding the Fourth Proportional to 810.48, 1,118.49 and 760.94

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Solution

The fourth proportional to 810.48, 1,118.49 and 760.94 is: 1,050.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.48 : 1,118.49 = 760.94 : x
  2. Step 2: Convert to fraction form
    810.48/1,118.49 = 760.94/x
  3. Step 3: Cross multiply
    810.48x = 1,118.49 × 760.94
  4. Step 4: Simplify right side
    810.48x = 851,103.78
  5. Step 5: Solve for x
    x = 851,103.78/810.48
  6. Step 6: Final answer
    x = 1,050.12

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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.