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Finding the Fourth Proportional to 662.57, 914.73 and 400.67

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Solution

The fourth proportional to 662.57, 914.73 and 400.67 is: 553.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.57 : 914.73 = 400.67 : x
  2. Step 2: Convert to fraction form
    662.57/914.73 = 400.67/x
  3. Step 3: Cross multiply
    662.57x = 914.73 × 400.67
  4. Step 4: Simplify right side
    662.57x = 366,504.87
  5. Step 5: Solve for x
    x = 366,504.87/662.57
  6. Step 6: Final answer
    x = 553.16

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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.