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Finding the Fourth Proportional to 662.99, 912.26 and 557.69

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Solution

The fourth proportional to 662.99, 912.26 and 557.69 is: 767.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.99 : 912.26 = 557.69 : x
  2. Step 2: Convert to fraction form
    662.99/912.26 = 557.69/x
  3. Step 3: Cross multiply
    662.99x = 912.26 × 557.69
  4. Step 4: Simplify right side
    662.99x = 508,755.11
  5. Step 5: Solve for x
    x = 508,755.11/662.99
  6. Step 6: Final answer
    x = 767.37

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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.