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Finding the Fourth Proportional to 341.15, 511.78 and 135.72

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Solution

The fourth proportional to 341.15, 511.78 and 135.72 is: 203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.15 : 511.78 = 135.72 : x
  2. Step 2: Convert to fraction form
    341.15/511.78 = 135.72/x
  3. Step 3: Cross multiply
    341.15x = 511.78 × 135.72
  4. Step 4: Simplify right side
    341.15x = 69,459.12
  5. Step 5: Solve for x
    x = 69,459.12/341.15
  6. Step 6: Final answer
    x = 203.60

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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.