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Finding the Fourth Proportional to 551.93, 761.31 and 394.34

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Solution

The fourth proportional to 551.93, 761.31 and 394.34 is: 543.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.93 : 761.31 = 394.34 : x
  2. Step 2: Convert to fraction form
    551.93/761.31 = 394.34/x
  3. Step 3: Cross multiply
    551.93x = 761.31 × 394.34
  4. Step 4: Simplify right side
    551.93x = 300,211.18
  5. Step 5: Solve for x
    x = 300,211.18/551.93
  6. Step 6: Final answer
    x = 543.93

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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.