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Finding the Fourth Proportional to 400.51, 552.45 and 313.03

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Solution

The fourth proportional to 400.51, 552.45 and 313.03 is: 431.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.51 : 552.45 = 313.03 : x
  2. Step 2: Convert to fraction form
    400.51/552.45 = 313.03/x
  3. Step 3: Cross multiply
    400.51x = 552.45 × 313.03
  4. Step 4: Simplify right side
    400.51x = 172,933.42
  5. Step 5: Solve for x
    x = 172,933.42/400.51
  6. Step 6: Final answer
    x = 431.78

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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.