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Finding the Fourth Proportional to 348.80, 520.72 and 347.84

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Solution

The fourth proportional to 348.80, 520.72 and 347.84 is: 519.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.80 : 520.72 = 347.84 : x
  2. Step 2: Convert to fraction form
    348.80/520.72 = 347.84/x
  3. Step 3: Cross multiply
    348.80x = 520.72 × 347.84
  4. Step 4: Simplify right side
    348.80x = 181,127.24
  5. Step 5: Solve for x
    x = 181,127.24/348.80
  6. Step 6: Final answer
    x = 519.29

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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.