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Finding the Fourth Proportional to 282.16, 389.40 and 157.83

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Solution

The fourth proportional to 282.16, 389.40 and 157.83 is: 217.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.16 : 389.40 = 157.83 : x
  2. Step 2: Convert to fraction form
    282.16/389.40 = 157.83/x
  3. Step 3: Cross multiply
    282.16x = 389.40 × 157.83
  4. Step 4: Simplify right side
    282.16x = 61,458.24
  5. Step 5: Solve for x
    x = 61,458.24/282.16
  6. Step 6: Final answer
    x = 217.82

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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.