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Finding the Fourth Proportional to 282.19, 390.23 and 269.30

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Solution

The fourth proportional to 282.19, 390.23 and 269.30 is: 372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.19 : 390.23 = 269.30 : x
  2. Step 2: Convert to fraction form
    282.19/390.23 = 269.30/x
  3. Step 3: Cross multiply
    282.19x = 390.23 × 269.30
  4. Step 4: Simplify right side
    282.19x = 105,086.65
  5. Step 5: Solve for x
    x = 105,086.65/282.19
  6. Step 6: Final answer
    x = 372.40

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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.