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Finding the Fourth Proportional to 738.36, 1,107.63 and 661.83

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Solution

The fourth proportional to 738.36, 1,107.63 and 661.83 is: 992.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.36 : 1,107.63 = 661.83 : x
  2. Step 2: Convert to fraction form
    738.36/1,107.63 = 661.83/x
  3. Step 3: Cross multiply
    738.36x = 1,107.63 × 661.83
  4. Step 4: Simplify right side
    738.36x = 733,062.76
  5. Step 5: Solve for x
    x = 733,062.76/738.36
  6. Step 6: Final answer
    x = 992.83

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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.