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Finding the Fourth Proportional to 284.36, 426.32 and 145.42

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Solution

The fourth proportional to 284.36, 426.32 and 145.42 is: 218.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.36 : 426.32 = 145.42 : x
  2. Step 2: Convert to fraction form
    284.36/426.32 = 145.42/x
  3. Step 3: Cross multiply
    284.36x = 426.32 × 145.42
  4. Step 4: Simplify right side
    284.36x = 61,995.45
  5. Step 5: Solve for x
    x = 61,995.45/284.36
  6. Step 6: Final answer
    x = 218.02

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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.