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Finding the Fourth Proportional to 680.00, 1,015.02 and 631.94

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Solution

The fourth proportional to 680.00, 1,015.02 and 631.94 is: 943.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.00 : 1,015.02 = 631.94 : x
  2. Step 2: Convert to fraction form
    680.00/1,015.02 = 631.94/x
  3. Step 3: Cross multiply
    680.00x = 1,015.02 × 631.94
  4. Step 4: Simplify right side
    680.00x = 641,426.66
  5. Step 5: Solve for x
    x = 641,426.66/680.00
  6. Step 6: Final answer
    x = 943.28

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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.