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Finding the Fourth Proportional to 317.55, 438.03 and 247.35

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Solution

The fourth proportional to 317.55, 438.03 and 247.35 is: 341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.55 : 438.03 = 247.35 : x
  2. Step 2: Convert to fraction form
    317.55/438.03 = 247.35/x
  3. Step 3: Cross multiply
    317.55x = 438.03 × 247.35
  4. Step 4: Simplify right side
    317.55x = 108,346.72
  5. Step 5: Solve for x
    x = 108,346.72/317.55
  6. Step 6: Final answer
    x = 341.20

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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.