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Finding the Fourth Proportional to 424.56, 637.00 and 219.00

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Solution

The fourth proportional to 424.56, 637.00 and 219.00 is: 328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.56 : 637.00 = 219.00 : x
  2. Step 2: Convert to fraction form
    424.56/637.00 = 219.00/x
  3. Step 3: Cross multiply
    424.56x = 637.00 × 219.00
  4. Step 4: Simplify right side
    424.56x = 139,499.47
  5. Step 5: Solve for x
    x = 139,499.47/424.56
  6. Step 6: Final answer
    x = 328.58

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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.