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Finding the Fourth Proportional to 476.31, 713.08 and 355.11

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Solution

The fourth proportional to 476.31, 713.08 and 355.11 is: 531.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.31 : 713.08 = 355.11 : x
  2. Step 2: Convert to fraction form
    476.31/713.08 = 355.11/x
  3. Step 3: Cross multiply
    476.31x = 713.08 × 355.11
  4. Step 4: Simplify right side
    476.31x = 253,221.84
  5. Step 5: Solve for x
    x = 253,221.84/476.31
  6. Step 6: Final answer
    x = 531.63

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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.