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Finding the Fourth Proportional to 792.65, 1,092.72 and 555.86

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Solution

The fourth proportional to 792.65, 1,092.72 and 555.86 is: 766.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.65 : 1,092.72 = 555.86 : x
  2. Step 2: Convert to fraction form
    792.65/1,092.72 = 555.86/x
  3. Step 3: Cross multiply
    792.65x = 1,092.72 × 555.86
  4. Step 4: Simplify right side
    792.65x = 607,399.34
  5. Step 5: Solve for x
    x = 607,399.34/792.65
  6. Step 6: Final answer
    x = 766.29

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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.