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Finding the Fourth Proportional to 927.72, 1,393.64 and 792.40

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Solution

The fourth proportional to 927.72, 1,393.64 and 792.40 is: 1,190.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.72 : 1,393.64 = 792.40 : x
  2. Step 2: Convert to fraction form
    927.72/1,393.64 = 792.40/x
  3. Step 3: Cross multiply
    927.72x = 1,393.64 × 792.40
  4. Step 4: Simplify right side
    927.72x = 1,104,320.34
  5. Step 5: Solve for x
    x = 1,104,320.34/927.72
  6. Step 6: Final answer
    x = 1,190.36

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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.