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Finding the Fourth Proportional to 400.70, 552.64 and 354.12

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Solution

The fourth proportional to 400.70, 552.64 and 354.12 is: 488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.70 : 552.64 = 354.12 : x
  2. Step 2: Convert to fraction form
    400.70/552.64 = 354.12/x
  3. Step 3: Cross multiply
    400.70x = 552.64 × 354.12
  4. Step 4: Simplify right side
    400.70x = 195,700.88
  5. Step 5: Solve for x
    x = 195,700.88/400.70
  6. Step 6: Final answer
    x = 488.40

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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.