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Finding the Fourth Proportional to 349.68, 482.19 and 283.22

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Solution

The fourth proportional to 349.68, 482.19 and 283.22 is: 390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.68 : 482.19 = 283.22 : x
  2. Step 2: Convert to fraction form
    349.68/482.19 = 283.22/x
  3. Step 3: Cross multiply
    349.68x = 482.19 × 283.22
  4. Step 4: Simplify right side
    349.68x = 136,565.85
  5. Step 5: Solve for x
    x = 136,565.85/349.68
  6. Step 6: Final answer
    x = 390.55

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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.