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Finding the Fourth Proportional to 551.12, 759.63 and 385.04

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Solution

The fourth proportional to 551.12, 759.63 and 385.04 is: 530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.12 : 759.63 = 385.04 : x
  2. Step 2: Convert to fraction form
    551.12/759.63 = 385.04/x
  3. Step 3: Cross multiply
    551.12x = 759.63 × 385.04
  4. Step 4: Simplify right side
    551.12x = 292,484.14
  5. Step 5: Solve for x
    x = 292,484.14/551.12
  6. Step 6: Final answer
    x = 530.71

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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.