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Finding the Fourth Proportional to 476.63, 715.21 and 220.13

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Solution

The fourth proportional to 476.63, 715.21 and 220.13 is: 330.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.63 : 715.21 = 220.13 : x
  2. Step 2: Convert to fraction form
    476.63/715.21 = 220.13/x
  3. Step 3: Cross multiply
    476.63x = 715.21 × 220.13
  4. Step 4: Simplify right side
    476.63x = 157,435.05
  5. Step 5: Solve for x
    x = 157,435.05/476.63
  6. Step 6: Final answer
    x = 330.31

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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.