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Finding the Fourth Proportional to 284.04, 425.61 and 215.48

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Solution

The fourth proportional to 284.04, 425.61 and 215.48 is: 322.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.04 : 425.61 = 215.48 : x
  2. Step 2: Convert to fraction form
    284.04/425.61 = 215.48/x
  3. Step 3: Cross multiply
    284.04x = 425.61 × 215.48
  4. Step 4: Simplify right side
    284.04x = 91,711.51
  5. Step 5: Solve for x
    x = 91,711.51/284.04
  6. Step 6: Final answer
    x = 322.88

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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.