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Finding the Fourth Proportional to 282.70, 390.08 and 164.69

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Solution

The fourth proportional to 282.70, 390.08 and 164.69 is: 227.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.70 : 390.08 = 164.69 : x
  2. Step 2: Convert to fraction form
    282.70/390.08 = 164.69/x
  3. Step 3: Cross multiply
    282.70x = 390.08 × 164.69
  4. Step 4: Simplify right side
    282.70x = 64,242.28
  5. Step 5: Solve for x
    x = 64,242.28/282.70
  6. Step 6: Final answer
    x = 227.25

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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.