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Finding the Fourth Proportional to 551.05, 760.31 and 440.75

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Solution

The fourth proportional to 551.05, 760.31 and 440.75 is: 608.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.05 : 760.31 = 440.75 : x
  2. Step 2: Convert to fraction form
    551.05/760.31 = 440.75/x
  3. Step 3: Cross multiply
    551.05x = 760.31 × 440.75
  4. Step 4: Simplify right side
    551.05x = 335,106.63
  5. Step 5: Solve for x
    x = 335,106.63/551.05
  6. Step 6: Final answer
    x = 608.12

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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.