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Finding the Fourth Proportional to 345.65, 518.36 and 114.49

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Solution

The fourth proportional to 345.65, 518.36 and 114.49 is: 171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.65 : 518.36 = 114.49 : x
  2. Step 2: Convert to fraction form
    345.65/518.36 = 114.49/x
  3. Step 3: Cross multiply
    345.65x = 518.36 × 114.49
  4. Step 4: Simplify right side
    345.65x = 59,346.46
  5. Step 5: Solve for x
    x = 59,346.46/345.65
  6. Step 6: Final answer
    x = 171.70

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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.