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Finding the Fourth Proportional to 395.62, 544.80 and 387.10

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Solution

The fourth proportional to 395.62, 544.80 and 387.10 is: 533.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.62 : 544.80 = 387.10 : x
  2. Step 2: Convert to fraction form
    395.62/544.80 = 387.10/x
  3. Step 3: Cross multiply
    395.62x = 544.80 × 387.10
  4. Step 4: Simplify right side
    395.62x = 210,892.08
  5. Step 5: Solve for x
    x = 210,892.08/395.62
  6. Step 6: Final answer
    x = 533.07

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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.