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Finding the Fourth Proportional to 284.00, 425.98 and 78.56

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Solution

The fourth proportional to 284.00, 425.98 and 78.56 is: 117.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.00 : 425.98 = 78.56 : x
  2. Step 2: Convert to fraction form
    284.00/425.98 = 78.56/x
  3. Step 3: Cross multiply
    284.00x = 425.98 × 78.56
  4. Step 4: Simplify right side
    284.00x = 33,462.66
  5. Step 5: Solve for x
    x = 33,462.66/284.00
  6. Step 6: Final answer
    x = 117.83

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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.