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Finding the Fourth Proportional to 557.69, 769.32 and 348.10

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Solution

The fourth proportional to 557.69, 769.32 and 348.10 is: 480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.69 : 769.32 = 348.10 : x
  2. Step 2: Convert to fraction form
    557.69/769.32 = 348.10/x
  3. Step 3: Cross multiply
    557.69x = 769.32 × 348.10
  4. Step 4: Simplify right side
    557.69x = 267,799.35
  5. Step 5: Solve for x
    x = 267,799.35/557.69
  6. Step 6: Final answer
    x = 480.20

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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.