Home / 1,914.40-2,642.28-1,129

Finding the Fourth Proportional to 1,914.40, 2,642.28 and 1,129

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Solution

The fourth proportional to 1,914.40, 2,642.28 and 1,129 is: 1,558.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.40 : 2,642.28 = 1,129 : x
  2. Step 2: Convert to fraction form
    1,914.40/2,642.28 = 1,129/x
  3. Step 3: Cross multiply
    1,914.40x = 2,642.28 × 1,129
  4. Step 4: Simplify right side
    1,914.40x = 2,983,134.12
  5. Step 5: Solve for x
    x = 2,983,134.12/1,914.40
  6. Step 6: Final answer
    x = 1,558.26

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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.