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Finding the Fourth Proportional to 551.58, 760.75 and 385.62

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Solution

The fourth proportional to 551.58, 760.75 and 385.62 is: 531.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.58 : 760.75 = 385.62 : x
  2. Step 2: Convert to fraction form
    551.58/760.75 = 385.62/x
  3. Step 3: Cross multiply
    551.58x = 760.75 × 385.62
  4. Step 4: Simplify right side
    551.58x = 293,360.42
  5. Step 5: Solve for x
    x = 293,360.42/551.58
  6. Step 6: Final answer
    x = 531.85

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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.