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Finding the Fourth Proportional to 341.35, 511.62 and 135.78

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Solution

The fourth proportional to 341.35, 511.62 and 135.78 is: 203.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.35 : 511.62 = 135.78 : x
  2. Step 2: Convert to fraction form
    341.35/511.62 = 135.78/x
  3. Step 3: Cross multiply
    341.35x = 511.62 × 135.78
  4. Step 4: Simplify right side
    341.35x = 69,465.34
  5. Step 5: Solve for x
    x = 69,465.34/341.35
  6. Step 6: Final answer
    x = 203.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.