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Finding the Fourth Proportional to 1,436.32, 2,149.04 and 851.63

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Solution

The fourth proportional to 1,436.32, 2,149.04 and 851.63 is: 1,274.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.32 : 2,149.04 = 851.63 : x
  2. Step 2: Convert to fraction form
    1,436.32/2,149.04 = 851.63/x
  3. Step 3: Cross multiply
    1,436.32x = 2,149.04 × 851.63
  4. Step 4: Simplify right side
    1,436.32x = 1,830,182.68
  5. Step 5: Solve for x
    x = 1,830,182.68/1,436.32
  6. Step 6: Final answer
    x = 1,274.22

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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.