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Finding the Fourth Proportional to 400.98, 553.55 and 270.67

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Solution

The fourth proportional to 400.98, 553.55 and 270.67 is: 373.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.98 : 553.55 = 270.67 : x
  2. Step 2: Convert to fraction form
    400.98/553.55 = 270.67/x
  3. Step 3: Cross multiply
    400.98x = 553.55 × 270.67
  4. Step 4: Simplify right side
    400.98x = 149,826.50
  5. Step 5: Solve for x
    x = 149,826.50/400.98
  6. Step 6: Final answer
    x = 373.66

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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.