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Finding the Fourth Proportional to 476.74, 715.62 and 422.23

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Solution

The fourth proportional to 476.74, 715.62 and 422.23 is: 633.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.74 : 715.62 = 422.23 : x
  2. Step 2: Convert to fraction form
    476.74/715.62 = 422.23/x
  3. Step 3: Cross multiply
    476.74x = 715.62 × 422.23
  4. Step 4: Simplify right side
    476.74x = 302,156.23
  5. Step 5: Solve for x
    x = 302,156.23/476.74
  6. Step 6: Final answer
    x = 633.80

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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.