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Finding the Fourth Proportional to 262.71, 392.47 and 189

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Solution

The fourth proportional to 262.71, 392.47 and 189 is: 282.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.71 : 392.47 = 189 : x
  2. Step 2: Convert to fraction form
    262.71/392.47 = 189/x
  3. Step 3: Cross multiply
    262.71x = 392.47 × 189
  4. Step 4: Simplify right side
    262.71x = 74,176.83
  5. Step 5: Solve for x
    x = 74,176.83/262.71
  6. Step 6: Final answer
    x = 282.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.