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Finding the Fourth Proportional to 792.78, 1,188.48 and 306.18

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Solution

The fourth proportional to 792.78, 1,188.48 and 306.18 is: 459.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.78 : 1,188.48 = 306.18 : x
  2. Step 2: Convert to fraction form
    792.78/1,188.48 = 306.18/x
  3. Step 3: Cross multiply
    792.78x = 1,188.48 × 306.18
  4. Step 4: Simplify right side
    792.78x = 363,888.81
  5. Step 5: Solve for x
    x = 363,888.81/792.78
  6. Step 6: Final answer
    x = 459.00

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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.