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Finding the Fourth Proportional to 551.07, 760.40 and 329.99

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Solution

The fourth proportional to 551.07, 760.40 and 329.99 is: 455.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.07 : 760.40 = 329.99 : x
  2. Step 2: Convert to fraction form
    551.07/760.40 = 329.99/x
  3. Step 3: Cross multiply
    551.07x = 760.40 × 329.99
  4. Step 4: Simplify right side
    551.07x = 250,922.75
  5. Step 5: Solve for x
    x = 250,922.75/551.07
  6. Step 6: Final answer
    x = 455.34

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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.