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Finding the Fourth Proportional to 992.37, 1,368.04 and 696.72

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Solution

The fourth proportional to 992.37, 1,368.04 and 696.72 is: 960.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.37 : 1,368.04 = 696.72 : x
  2. Step 2: Convert to fraction form
    992.37/1,368.04 = 696.72/x
  3. Step 3: Cross multiply
    992.37x = 1,368.04 × 696.72
  4. Step 4: Simplify right side
    992.37x = 953,140.83
  5. Step 5: Solve for x
    x = 953,140.83/992.37
  6. Step 6: Final answer
    x = 960.47

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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.