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Finding the Fourth Proportional to 424.81, 639.73 and 371.35

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Solution

The fourth proportional to 424.81, 639.73 and 371.35 is: 559.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.81 : 639.73 = 371.35 : x
  2. Step 2: Convert to fraction form
    424.81/639.73 = 371.35/x
  3. Step 3: Cross multiply
    424.81x = 639.73 × 371.35
  4. Step 4: Simplify right side
    424.81x = 237,563.74
  5. Step 5: Solve for x
    x = 237,563.74/424.81
  6. Step 6: Final answer
    x = 559.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.