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Finding the Fourth Proportional to 285.27, 393.71 and 207.51

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Solution

The fourth proportional to 285.27, 393.71 and 207.51 is: 286.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.27 : 393.71 = 207.51 : x
  2. Step 2: Convert to fraction form
    285.27/393.71 = 207.51/x
  3. Step 3: Cross multiply
    285.27x = 393.71 × 207.51
  4. Step 4: Simplify right side
    285.27x = 81,697.72
  5. Step 5: Solve for x
    x = 81,697.72/285.27
  6. Step 6: Final answer
    x = 286.39

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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.