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Finding the Fourth Proportional to 346.11, 518.08 and 258.93

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Solution

The fourth proportional to 346.11, 518.08 and 258.93 is: 387.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.11 : 518.08 = 258.93 : x
  2. Step 2: Convert to fraction form
    346.11/518.08 = 258.93/x
  3. Step 3: Cross multiply
    346.11x = 518.08 × 258.93
  4. Step 4: Simplify right side
    346.11x = 134,146.45
  5. Step 5: Solve for x
    x = 134,146.45/346.11
  6. Step 6: Final answer
    x = 387.58

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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.