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Finding the Fourth Proportional to 374.42, 515.78 and 347.84

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Solution

The fourth proportional to 374.42, 515.78 and 347.84 is: 479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.42 : 515.78 = 347.84 : x
  2. Step 2: Convert to fraction form
    374.42/515.78 = 347.84/x
  3. Step 3: Cross multiply
    374.42x = 515.78 × 347.84
  4. Step 4: Simplify right side
    374.42x = 179,404.60
  5. Step 5: Solve for x
    x = 179,404.60/374.42
  6. Step 6: Final answer
    x = 479.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.