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Finding the Fourth Proportional to 521.98, 783.09 and 247.93

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Solution

The fourth proportional to 521.98, 783.09 and 247.93 is: 371.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.98 : 783.09 = 247.93 : x
  2. Step 2: Convert to fraction form
    521.98/783.09 = 247.93/x
  3. Step 3: Cross multiply
    521.98x = 783.09 × 247.93
  4. Step 4: Simplify right side
    521.98x = 194,149.55
  5. Step 5: Solve for x
    x = 194,149.55/521.98
  6. Step 6: Final answer
    x = 371.95

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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.