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Finding the Fourth Proportional to 551.83, 761.56 and 330.90

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Solution

The fourth proportional to 551.83, 761.56 and 330.90 is: 456.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.83 : 761.56 = 330.90 : x
  2. Step 2: Convert to fraction form
    551.83/761.56 = 330.90/x
  3. Step 3: Cross multiply
    551.83x = 761.56 × 330.90
  4. Step 4: Simplify right side
    551.83x = 252,000.45
  5. Step 5: Solve for x
    x = 252,000.45/551.83
  6. Step 6: Final answer
    x = 456.66

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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.