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Finding the Fourth Proportional to 736.83, 1,099.85 and 640.00

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Solution

The fourth proportional to 736.83, 1,099.85 and 640.00 is: 955.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.83 : 1,099.85 = 640.00 : x
  2. Step 2: Convert to fraction form
    736.83/1,099.85 = 640.00/x
  3. Step 3: Cross multiply
    736.83x = 1,099.85 × 640.00
  4. Step 4: Simplify right side
    736.83x = 703,902.17
  5. Step 5: Solve for x
    x = 703,902.17/736.83
  6. Step 6: Final answer
    x = 955.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.