Home / 3,787.78-5,681.64-1,155.28

Finding the Fourth Proportional to 3,787.78, 5,681.64 and 1,155.28

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Solution

The fourth proportional to 3,787.78, 5,681.64 and 1,155.28 is: 1,732.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.78 : 5,681.64 = 1,155.28 : x
  2. Step 2: Convert to fraction form
    3,787.78/5,681.64 = 1,155.28/x
  3. Step 3: Cross multiply
    3,787.78x = 5,681.64 × 1,155.28
  4. Step 4: Simplify right side
    3,787.78x = 6,563,885.06
  5. Step 5: Solve for x
    x = 6,563,885.06/3,787.78
  6. Step 6: Final answer
    x = 1,732.91

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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.