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Finding the Fourth Proportional to 401.80, 601.62 and 353.20

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Solution

The fourth proportional to 401.80, 601.62 and 353.20 is: 528.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.80 : 601.62 = 353.20 : x
  2. Step 2: Convert to fraction form
    401.80/601.62 = 353.20/x
  3. Step 3: Cross multiply
    401.80x = 601.62 × 353.20
  4. Step 4: Simplify right side
    401.80x = 212,492.18
  5. Step 5: Solve for x
    x = 212,492.18/401.80
  6. Step 6: Final answer
    x = 528.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.