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Finding the Fourth Proportional to 317.64, 438.27 and 207.10

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Solution

The fourth proportional to 317.64, 438.27 and 207.10 is: 285.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.64 : 438.27 = 207.10 : x
  2. Step 2: Convert to fraction form
    317.64/438.27 = 207.10/x
  3. Step 3: Cross multiply
    317.64x = 438.27 × 207.10
  4. Step 4: Simplify right side
    317.64x = 90,765.49
  5. Step 5: Solve for x
    x = 90,765.49/317.64
  6. Step 6: Final answer
    x = 285.75

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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.