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Finding the Fourth Proportional to 551.64, 761.30 and 302.97

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Solution

The fourth proportional to 551.64, 761.30 and 302.97 is: 418.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.64 : 761.30 = 302.97 : x
  2. Step 2: Convert to fraction form
    551.64/761.30 = 302.97/x
  3. Step 3: Cross multiply
    551.64x = 761.30 × 302.97
  4. Step 4: Simplify right side
    551.64x = 230,649.55
  5. Step 5: Solve for x
    x = 230,649.55/551.64
  6. Step 6: Final answer
    x = 418.12

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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.