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Finding the Fourth Proportional to 1,424.39, 2,137.53 and 547.62

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Solution

The fourth proportional to 1,424.39, 2,137.53 and 547.62 is: 821.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.39 : 2,137.53 = 547.62 : x
  2. Step 2: Convert to fraction form
    1,424.39/2,137.53 = 547.62/x
  3. Step 3: Cross multiply
    1,424.39x = 2,137.53 × 547.62
  4. Step 4: Simplify right side
    1,424.39x = 1,170,548.22
  5. Step 5: Solve for x
    x = 1,170,548.22/1,424.39
  6. Step 6: Final answer
    x = 821.79

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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.