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Finding the Fourth Proportional to 400.70, 553.82 and 302.28

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Solution

The fourth proportional to 400.70, 553.82 and 302.28 is: 417.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.70 : 553.82 = 302.28 : x
  2. Step 2: Convert to fraction form
    400.70/553.82 = 302.28/x
  3. Step 3: Cross multiply
    400.70x = 553.82 × 302.28
  4. Step 4: Simplify right side
    400.70x = 167,408.71
  5. Step 5: Solve for x
    x = 167,408.71/400.70
  6. Step 6: Final answer
    x = 417.79

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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.