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Finding the Fourth Proportional to 769.56, 1,154.40 and 276.07

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Solution

The fourth proportional to 769.56, 1,154.40 and 276.07 is: 414.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.56 : 1,154.40 = 276.07 : x
  2. Step 2: Convert to fraction form
    769.56/1,154.40 = 276.07/x
  3. Step 3: Cross multiply
    769.56x = 1,154.40 × 276.07
  4. Step 4: Simplify right side
    769.56x = 318,695.21
  5. Step 5: Solve for x
    x = 318,695.21/769.56
  6. Step 6: Final answer
    x = 414.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.