Home / 2,765.90-4,147.40-916.82

Finding the Fourth Proportional to 2,765.90, 4,147.40 and 916.82

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Solution

The fourth proportional to 2,765.90, 4,147.40 and 916.82 is: 1,374.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.90 : 4,147.40 = 916.82 : x
  2. Step 2: Convert to fraction form
    2,765.90/4,147.40 = 916.82/x
  3. Step 3: Cross multiply
    2,765.90x = 4,147.40 × 916.82
  4. Step 4: Simplify right side
    2,765.90x = 3,802,416.38
  5. Step 5: Solve for x
    x = 3,802,416.38/2,765.90
  6. Step 6: Final answer
    x = 1,374.75

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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.