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Finding the Fourth Proportional to 992.32, 1,370.76 and 805.60

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Solution

The fourth proportional to 992.32, 1,370.76 and 805.60 is: 1,112.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.32 : 1,370.76 = 805.60 : x
  2. Step 2: Convert to fraction form
    992.32/1,370.76 = 805.60/x
  3. Step 3: Cross multiply
    992.32x = 1,370.76 × 805.60
  4. Step 4: Simplify right side
    992.32x = 1,104,284.26
  5. Step 5: Solve for x
    x = 1,104,284.26/992.32
  6. Step 6: Final answer
    x = 1,112.83

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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.