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Finding the Fourth Proportional to 282.95, 390.46 and 158.59

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Solution

The fourth proportional to 282.95, 390.46 and 158.59 is: 218.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.95 : 390.46 = 158.59 : x
  2. Step 2: Convert to fraction form
    282.95/390.46 = 158.59/x
  3. Step 3: Cross multiply
    282.95x = 390.46 × 158.59
  4. Step 4: Simplify right side
    282.95x = 61,921.10
  5. Step 5: Solve for x
    x = 61,921.10/282.95
  6. Step 6: Final answer
    x = 218.84

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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.