Home / 1,539.35-2,123.57-1,119.05

Finding the Fourth Proportional to 1,539.35, 2,123.57 and 1,119.05

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Solution

The fourth proportional to 1,539.35, 2,123.57 and 1,119.05 is: 1,543.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.35 : 2,123.57 = 1,119.05 : x
  2. Step 2: Convert to fraction form
    1,539.35/2,123.57 = 1,119.05/x
  3. Step 3: Cross multiply
    1,539.35x = 2,123.57 × 1,119.05
  4. Step 4: Simplify right side
    1,539.35x = 2,376,375.41
  5. Step 5: Solve for x
    x = 2,376,375.41/1,539.35
  6. Step 6: Final answer
    x = 1,543.75

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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.