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Finding the Fourth Proportional to 282.19, 423.22 and 191.45

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Solution

The fourth proportional to 282.19, 423.22 and 191.45 is: 287.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.19 : 423.22 = 191.45 : x
  2. Step 2: Convert to fraction form
    282.19/423.22 = 191.45/x
  3. Step 3: Cross multiply
    282.19x = 423.22 × 191.45
  4. Step 4: Simplify right side
    282.19x = 81,024.51
  5. Step 5: Solve for x
    x = 81,024.51/282.19
  6. Step 6: Final answer
    x = 287.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.