Home / 1,161.60-1,741.80-430.80

Finding the Fourth Proportional to 1,161.60, 1,741.80 and 430.80

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Solution

The fourth proportional to 1,161.60, 1,741.80 and 430.80 is: 645.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.60 : 1,741.80 = 430.80 : x
  2. Step 2: Convert to fraction form
    1,161.60/1,741.80 = 430.80/x
  3. Step 3: Cross multiply
    1,161.60x = 1,741.80 × 430.80
  4. Step 4: Simplify right side
    1,161.60x = 750,367.44
  5. Step 5: Solve for x
    x = 750,367.44/1,161.60
  6. Step 6: Final answer
    x = 645.98

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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.