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Finding the Fourth Proportional to 340.34, 469.38 and 247.40

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Solution

The fourth proportional to 340.34, 469.38 and 247.40 is: 341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.34 : 469.38 = 247.40 : x
  2. Step 2: Convert to fraction form
    340.34/469.38 = 247.40/x
  3. Step 3: Cross multiply
    340.34x = 469.38 × 247.40
  4. Step 4: Simplify right side
    340.34x = 116,124.61
  5. Step 5: Solve for x
    x = 116,124.61/340.34
  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.