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Finding the Fourth Proportional to 348.90, 521.01 and 328.65

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Solution

The fourth proportional to 348.90, 521.01 and 328.65 is: 490.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.90 : 521.01 = 328.65 : x
  2. Step 2: Convert to fraction form
    348.90/521.01 = 328.65/x
  3. Step 3: Cross multiply
    348.90x = 521.01 × 328.65
  4. Step 4: Simplify right side
    348.90x = 171,229.94
  5. Step 5: Solve for x
    x = 171,229.94/348.90
  6. Step 6: Final answer
    x = 490.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.