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Finding the Fourth Proportional to 284.41, 390.19 and 270.64

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Solution

The fourth proportional to 284.41, 390.19 and 270.64 is: 371.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.41 : 390.19 = 270.64 : x
  2. Step 2: Convert to fraction form
    284.41/390.19 = 270.64/x
  3. Step 3: Cross multiply
    284.41x = 390.19 × 270.64
  4. Step 4: Simplify right side
    284.41x = 105,601.02
  5. Step 5: Solve for x
    x = 105,601.02/284.41
  6. Step 6: Final answer
    x = 371.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.