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Finding the Fourth Proportional to 2,877.66, 4,316.22 and 931.14

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Solution

The fourth proportional to 2,877.66, 4,316.22 and 931.14 is: 1,396.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,877.66 : 4,316.22 = 931.14 : x
  2. Step 2: Convert to fraction form
    2,877.66/4,316.22 = 931.14/x
  3. Step 3: Cross multiply
    2,877.66x = 4,316.22 × 931.14
  4. Step 4: Simplify right side
    2,877.66x = 4,019,005.09
  5. Step 5: Solve for x
    x = 4,019,005.09/2,877.66
  6. Step 6: Final answer
    x = 1,396.62

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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.