Home / 1,386.05-2,076.90-1,179.77

Finding the Fourth Proportional to 1,386.05, 2,076.90 and 1,179.77

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Solution

The fourth proportional to 1,386.05, 2,076.90 and 1,179.77 is: 1,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.05 : 2,076.90 = 1,179.77 : x
  2. Step 2: Convert to fraction form
    1,386.05/2,076.90 = 1,179.77/x
  3. Step 3: Cross multiply
    1,386.05x = 2,076.90 × 1,179.77
  4. Step 4: Simplify right side
    1,386.05x = 2,450,264.31
  5. Step 5: Solve for x
    x = 2,450,264.31/1,386.05
  6. Step 6: Final answer
    x = 1,767.80

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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.