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Finding the Fourth Proportional to 475.71, 713.58 and 215.59

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Solution

The fourth proportional to 475.71, 713.58 and 215.59 is: 323.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.71 : 713.58 = 215.59 : x
  2. Step 2: Convert to fraction form
    475.71/713.58 = 215.59/x
  3. Step 3: Cross multiply
    475.71x = 713.58 × 215.59
  4. Step 4: Simplify right side
    475.71x = 153,839.27
  5. Step 5: Solve for x
    x = 153,839.27/475.71
  6. Step 6: Final answer
    x = 323.39

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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.