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Finding the Fourth Proportional to 992.96, 1,370.60 and 579.04

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Solution

The fourth proportional to 992.96, 1,370.60 and 579.04 is: 799.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.96 : 1,370.60 = 579.04 : x
  2. Step 2: Convert to fraction form
    992.96/1,370.60 = 579.04/x
  3. Step 3: Cross multiply
    992.96x = 1,370.60 × 579.04
  4. Step 4: Simplify right side
    992.96x = 793,632.22
  5. Step 5: Solve for x
    x = 793,632.22/992.96
  6. Step 6: Final answer
    x = 799.26

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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.