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Finding the Fourth Proportional to 662.92, 914.67 and 400.89

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Solution

The fourth proportional to 662.92, 914.67 and 400.89 is: 553.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.92 : 914.67 = 400.89 : x
  2. Step 2: Convert to fraction form
    662.92/914.67 = 400.89/x
  3. Step 3: Cross multiply
    662.92x = 914.67 × 400.89
  4. Step 4: Simplify right side
    662.92x = 366,682.06
  5. Step 5: Solve for x
    x = 366,682.06/662.92
  6. Step 6: Final answer
    x = 553.13

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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.