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Finding the Fourth Proportional to 1,414.61, 2,120.40 and 536.70

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Solution

The fourth proportional to 1,414.61, 2,120.40 and 536.70 is: 804.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.61 : 2,120.40 = 536.70 : x
  2. Step 2: Convert to fraction form
    1,414.61/2,120.40 = 536.70/x
  3. Step 3: Cross multiply
    1,414.61x = 2,120.40 × 536.70
  4. Step 4: Simplify right side
    1,414.61x = 1,138,018.68
  5. Step 5: Solve for x
    x = 1,138,018.68/1,414.61
  6. Step 6: Final answer
    x = 804.48

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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.