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Finding the Fourth Proportional to 551.59, 760.90 and 330.48

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Solution

The fourth proportional to 551.59, 760.90 and 330.48 is: 455.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.59 : 760.90 = 330.48 : x
  2. Step 2: Convert to fraction form
    551.59/760.90 = 330.48/x
  3. Step 3: Cross multiply
    551.59x = 760.90 × 330.48
  4. Step 4: Simplify right side
    551.59x = 251,462.23
  5. Step 5: Solve for x
    x = 251,462.23/551.59
  6. Step 6: Final answer
    x = 455.89

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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.