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Finding the Fourth Proportional to 368.10, 551.79 and 265.91

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Solution

The fourth proportional to 368.10, 551.79 and 265.91 is: 398.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.10 : 551.79 = 265.91 : x
  2. Step 2: Convert to fraction form
    368.10/551.79 = 265.91/x
  3. Step 3: Cross multiply
    368.10x = 551.79 × 265.91
  4. Step 4: Simplify right side
    368.10x = 146,723.72
  5. Step 5: Solve for x
    x = 146,723.72/368.10
  6. Step 6: Final answer
    x = 398.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.