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Finding the Fourth Proportional to 349.76, 520.66 and 347.60

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Solution

The fourth proportional to 349.76, 520.66 and 347.60 is: 517.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.76 : 520.66 = 347.60 : x
  2. Step 2: Convert to fraction form
    349.76/520.66 = 347.60/x
  3. Step 3: Cross multiply
    349.76x = 520.66 × 347.60
  4. Step 4: Simplify right side
    349.76x = 180,981.42
  5. Step 5: Solve for x
    x = 180,981.42/349.76
  6. Step 6: Final answer
    x = 517.44

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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.