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Finding the Fourth Proportional to 339.95, 469.20 and 247.13

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Solution

The fourth proportional to 339.95, 469.20 and 247.13 is: 341.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.95 : 469.20 = 247.13 : x
  2. Step 2: Convert to fraction form
    339.95/469.20 = 247.13/x
  3. Step 3: Cross multiply
    339.95x = 469.20 × 247.13
  4. Step 4: Simplify right side
    339.95x = 115,953.40
  5. Step 5: Solve for x
    x = 115,953.40/339.95
  6. Step 6: Final answer
    x = 341.09

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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.