Home / 776,761.31-1,165,156.56-215,810.39

Finding the Fourth Proportional to 776,761.31, 1,165,156.56 and 215,810.39

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Solution

The fourth proportional to 776,761.31, 1,165,156.56 and 215,810.39 is: 323,719.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,761.31 : 1,165,156.56 = 215,810.39 : x
  2. Step 2: Convert to fraction form
    776,761.31/1,165,156.56 = 215,810.39/x
  3. Step 3: Cross multiply
    776,761.31x = 1,165,156.56 × 215,810.39
  4. Step 4: Simplify right side
    776,761.31x = 251,452,894,537.55
  5. Step 5: Solve for x
    x = 251,452,894,537.55/776,761.31
  6. Step 6: Final answer
    x = 323,719.64

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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.