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Finding the Fourth Proportional to 551.90, 761.46 and 330.89

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Solution

The fourth proportional to 551.90, 761.46 and 330.89 is: 456.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.90 : 761.46 = 330.89 : x
  2. Step 2: Convert to fraction form
    551.90/761.46 = 330.89/x
  3. Step 3: Cross multiply
    551.90x = 761.46 × 330.89
  4. Step 4: Simplify right side
    551.90x = 251,959.50
  5. Step 5: Solve for x
    x = 251,959.50/551.90
  6. Step 6: Final answer
    x = 456.53

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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.