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Finding the Fourth Proportional to 1,161.95, 1,742.97 and 340.29

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Solution

The fourth proportional to 1,161.95, 1,742.97 and 340.29 is: 510.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.95 : 1,742.97 = 340.29 : x
  2. Step 2: Convert to fraction form
    1,161.95/1,742.97 = 340.29/x
  3. Step 3: Cross multiply
    1,161.95x = 1,742.97 × 340.29
  4. Step 4: Simplify right side
    1,161.95x = 593,115.26
  5. Step 5: Solve for x
    x = 593,115.26/1,161.95
  6. Step 6: Final answer
    x = 510.45

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Double scale
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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.