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Finding the Fourth Proportional to 313.08, 431.61 and 247.50

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Solution

The fourth proportional to 313.08, 431.61 and 247.50 is: 341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.08 : 431.61 = 247.50 : x
  2. Step 2: Convert to fraction form
    313.08/431.61 = 247.50/x
  3. Step 3: Cross multiply
    313.08x = 431.61 × 247.50
  4. Step 4: Simplify right side
    313.08x = 106,823.48
  5. Step 5: Solve for x
    x = 106,823.48/313.08
  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.