Home / 1,539.10-2,302.62-1,189.78

Finding the Fourth Proportional to 1,539.10, 2,302.62 and 1,189.78

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Solution

The fourth proportional to 1,539.10, 2,302.62 and 1,189.78 is: 1,780.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.10 : 2,302.62 = 1,189.78 : x
  2. Step 2: Convert to fraction form
    1,539.10/2,302.62 = 1,189.78/x
  3. Step 3: Cross multiply
    1,539.10x = 2,302.62 × 1,189.78
  4. Step 4: Simplify right side
    1,539.10x = 2,739,611.22
  5. Step 5: Solve for x
    x = 2,739,611.22/1,539.10
  6. Step 6: Final answer
    x = 1,780.01

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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.