Home / 1,161.38-1,742.35-339.66

Finding the Fourth Proportional to 1,161.38, 1,742.35 and 339.66

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Solution

The fourth proportional to 1,161.38, 1,742.35 and 339.66 is: 509.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.38 : 1,742.35 = 339.66 : x
  2. Step 2: Convert to fraction form
    1,161.38/1,742.35 = 339.66/x
  3. Step 3: Cross multiply
    1,161.38x = 1,742.35 × 339.66
  4. Step 4: Simplify right side
    1,161.38x = 591,806.60
  5. Step 5: Solve for x
    x = 591,806.60/1,161.38
  6. Step 6: Final answer
    x = 509.57

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1.5x scale

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.