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Finding the Fourth Proportional to 1,161.41, 1,742.11 and 339.71

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Solution

The fourth proportional to 1,161.41, 1,742.11 and 339.71 is: 509.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.41 : 1,742.11 = 339.71 : x
  2. Step 2: Convert to fraction form
    1,161.41/1,742.11 = 339.71/x
  3. Step 3: Cross multiply
    1,161.41x = 1,742.11 × 339.71
  4. Step 4: Simplify right side
    1,161.41x = 591,802.63
  5. Step 5: Solve for x
    x = 591,802.63/1,161.41
  6. Step 6: Final answer
    x = 509.56

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Double scale
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Similar ratio
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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.