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Finding the Fourth Proportional to 477.33, 715.41 and 421.97

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Solution

The fourth proportional to 477.33, 715.41 and 421.97 is: 632.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.33 : 715.41 = 421.97 : x
  2. Step 2: Convert to fraction form
    477.33/715.41 = 421.97/x
  3. Step 3: Cross multiply
    477.33x = 715.41 × 421.97
  4. Step 4: Simplify right side
    477.33x = 301,877.98
  5. Step 5: Solve for x
    x = 301,877.98/477.33
  6. Step 6: Final answer
    x = 632.43

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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.