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Finding the Fourth Proportional to 551.95, 761.74 and 303.31

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Solution

The fourth proportional to 551.95, 761.74 and 303.31 is: 418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.95 : 761.74 = 303.31 : x
  2. Step 2: Convert to fraction form
    551.95/761.74 = 303.31/x
  3. Step 3: Cross multiply
    551.95x = 761.74 × 303.31
  4. Step 4: Simplify right side
    551.95x = 231,043.55
  5. Step 5: Solve for x
    x = 231,043.55/551.95
  6. Step 6: Final answer
    x = 418.60

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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.