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Finding the Fourth Proportional to 899.51, 1,350.07 and 640.51

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Solution

The fourth proportional to 899.51, 1,350.07 and 640.51 is: 961.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.51 : 1,350.07 = 640.51 : x
  2. Step 2: Convert to fraction form
    899.51/1,350.07 = 640.51/x
  3. Step 3: Cross multiply
    899.51x = 1,350.07 × 640.51
  4. Step 4: Simplify right side
    899.51x = 864,728.36
  5. Step 5: Solve for x
    x = 864,728.36/899.51
  6. Step 6: Final answer
    x = 961.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.