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Finding the Fourth Proportional to 551.95, 761.25 and 330.86

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Solution

The fourth proportional to 551.95, 761.25 and 330.86 is: 456.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.95 : 761.25 = 330.86 : x
  2. Step 2: Convert to fraction form
    551.95/761.25 = 330.86/x
  3. Step 3: Cross multiply
    551.95x = 761.25 × 330.86
  4. Step 4: Simplify right side
    551.95x = 251,867.18
  5. Step 5: Solve for x
    x = 251,867.18/551.95
  6. Step 6: Final answer
    x = 456.32

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Double scale
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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.