Home / 1,297.01-1,787.82-1,189.76

Finding the Fourth Proportional to 1,297.01, 1,787.82 and 1,189.76

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Solution

The fourth proportional to 1,297.01, 1,787.82 and 1,189.76 is: 1,639.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.01 : 1,787.82 = 1,189.76 : x
  2. Step 2: Convert to fraction form
    1,297.01/1,787.82 = 1,189.76/x
  3. Step 3: Cross multiply
    1,297.01x = 1,787.82 × 1,189.76
  4. Step 4: Simplify right side
    1,297.01x = 2,127,070.01
  5. Step 5: Solve for x
    x = 2,127,070.01/1,297.01
  6. Step 6: Final answer
    x = 1,639.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.