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Finding the Fourth Proportional to 317.23, 437.55 and 212.47

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Solution

The fourth proportional to 317.23, 437.55 and 212.47 is: 293.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.23 : 437.55 = 212.47 : x
  2. Step 2: Convert to fraction form
    317.23/437.55 = 212.47/x
  3. Step 3: Cross multiply
    317.23x = 437.55 × 212.47
  4. Step 4: Simplify right side
    317.23x = 92,966.25
  5. Step 5: Solve for x
    x = 92,966.25/317.23
  6. Step 6: Final answer
    x = 293.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.