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Finding the Fourth Proportional to 800.99, 1,105.53 and 506.06

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Solution

The fourth proportional to 800.99, 1,105.53 and 506.06 is: 698.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.99 : 1,105.53 = 506.06 : x
  2. Step 2: Convert to fraction form
    800.99/1,105.53 = 506.06/x
  3. Step 3: Cross multiply
    800.99x = 1,105.53 × 506.06
  4. Step 4: Simplify right side
    800.99x = 559,464.51
  5. Step 5: Solve for x
    x = 559,464.51/800.99
  6. Step 6: Final answer
    x = 698.47

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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.