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Finding the Fourth Proportional to 350.64, 484.20 and 291.72

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Solution

The fourth proportional to 350.64, 484.20 and 291.72 is: 402.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.64 : 484.20 = 291.72 : x
  2. Step 2: Convert to fraction form
    350.64/484.20 = 291.72/x
  3. Step 3: Cross multiply
    350.64x = 484.20 × 291.72
  4. Step 4: Simplify right side
    350.64x = 141,250.82
  5. Step 5: Solve for x
    x = 141,250.82/350.64
  6. Step 6: Final answer
    x = 402.84

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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.