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Finding the Fourth Proportional to 2,076.79, 3,115.18 and 615.83

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Solution

The fourth proportional to 2,076.79, 3,115.18 and 615.83 is: 923.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,076.79 : 3,115.18 = 615.83 : x
  2. Step 2: Convert to fraction form
    2,076.79/3,115.18 = 615.83/x
  3. Step 3: Cross multiply
    2,076.79x = 3,115.18 × 615.83
  4. Step 4: Simplify right side
    2,076.79x = 1,918,416.99
  5. Step 5: Solve for x
    x = 1,918,416.99/2,076.79
  6. Step 6: Final answer
    x = 923.74

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.