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Finding the Fourth Proportional to 551.31, 760.79 and 302.62

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Solution

The fourth proportional to 551.31, 760.79 and 302.62 is: 417.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.31 : 760.79 = 302.62 : x
  2. Step 2: Convert to fraction form
    551.31/760.79 = 302.62/x
  3. Step 3: Cross multiply
    551.31x = 760.79 × 302.62
  4. Step 4: Simplify right side
    551.31x = 230,230.27
  5. Step 5: Solve for x
    x = 230,230.27/551.31
  6. Step 6: Final answer
    x = 417.61

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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.