Home / 1,189.10-1,779.60-1,043.30

Finding the Fourth Proportional to 1,189.10, 1,779.60 and 1,043.30

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Solution

The fourth proportional to 1,189.10, 1,779.60 and 1,043.30 is: 1,561.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.10 : 1,779.60 = 1,043.30 : x
  2. Step 2: Convert to fraction form
    1,189.10/1,779.60 = 1,043.30/x
  3. Step 3: Cross multiply
    1,189.10x = 1,779.60 × 1,043.30
  4. Step 4: Simplify right side
    1,189.10x = 1,856,656.68
  5. Step 5: Solve for x
    x = 1,856,656.68/1,189.10
  6. Step 6: Final answer
    x = 1,561.40

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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.