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Finding the Fourth Proportional to 824.79, 1,138.52 and 510.11

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Solution

The fourth proportional to 824.79, 1,138.52 and 510.11 is: 704.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.79 : 1,138.52 = 510.11 : x
  2. Step 2: Convert to fraction form
    824.79/1,138.52 = 510.11/x
  3. Step 3: Cross multiply
    824.79x = 1,138.52 × 510.11
  4. Step 4: Simplify right side
    824.79x = 580,770.44
  5. Step 5: Solve for x
    x = 580,770.44/824.79
  6. Step 6: Final answer
    x = 704.14

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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.