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Finding the Fourth Proportional to 348.10, 521.08 and 260.92

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Solution

The fourth proportional to 348.10, 521.08 and 260.92 is: 390.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.10 : 521.08 = 260.92 : x
  2. Step 2: Convert to fraction form
    348.10/521.08 = 260.92/x
  3. Step 3: Cross multiply
    348.10x = 521.08 × 260.92
  4. Step 4: Simplify right side
    348.10x = 135,960.19
  5. Step 5: Solve for x
    x = 135,960.19/348.10
  6. Step 6: Final answer
    x = 390.58

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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.