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Finding the Fourth Proportional to 282.32, 389.58 and 157.95

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Solution

The fourth proportional to 282.32, 389.58 and 157.95 is: 217.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.32 : 389.58 = 157.95 : x
  2. Step 2: Convert to fraction form
    282.32/389.58 = 157.95/x
  3. Step 3: Cross multiply
    282.32x = 389.58 × 157.95
  4. Step 4: Simplify right side
    282.32x = 61,533.57
  5. Step 5: Solve for x
    x = 61,533.57/282.32
  6. Step 6: Final answer
    x = 217.96

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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.