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Finding the Fourth Proportional to 522.70, 783.15 and 248.20

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Solution

The fourth proportional to 522.70, 783.15 and 248.20 is: 371.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.70 : 783.15 = 248.20 : x
  2. Step 2: Convert to fraction form
    522.70/783.15 = 248.20/x
  3. Step 3: Cross multiply
    522.70x = 783.15 × 248.20
  4. Step 4: Simplify right side
    522.70x = 194,377.83
  5. Step 5: Solve for x
    x = 194,377.83/522.70
  6. Step 6: Final answer
    x = 371.87

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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.