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Finding the Fourth Proportional to 349.72, 482.55 and 202.30

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Solution

The fourth proportional to 349.72, 482.55 and 202.30 is: 279.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.72 : 482.55 = 202.30 : x
  2. Step 2: Convert to fraction form
    349.72/482.55 = 202.30/x
  3. Step 3: Cross multiply
    349.72x = 482.55 × 202.30
  4. Step 4: Simplify right side
    349.72x = 97,619.87
  5. Step 5: Solve for x
    x = 97,619.87/349.72
  6. Step 6: Final answer
    x = 279.14

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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.