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Finding the Fourth Proportional to 424.20, 636.99 and 356.28

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Solution

The fourth proportional to 424.20, 636.99 and 356.28 is: 535.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.20 : 636.99 = 356.28 : x
  2. Step 2: Convert to fraction form
    424.20/636.99 = 356.28/x
  3. Step 3: Cross multiply
    424.20x = 636.99 × 356.28
  4. Step 4: Simplify right side
    424.20x = 226,946.80
  5. Step 5: Solve for x
    x = 226,946.80/424.20
  6. Step 6: Final answer
    x = 535.00

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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.