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Finding the Fourth Proportional to 1,424.06, 2,135.39 and 499.49

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Solution

The fourth proportional to 1,424.06, 2,135.39 and 499.49 is: 748.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.06 : 2,135.39 = 499.49 : x
  2. Step 2: Convert to fraction form
    1,424.06/2,135.39 = 499.49/x
  3. Step 3: Cross multiply
    1,424.06x = 2,135.39 × 499.49
  4. Step 4: Simplify right side
    1,424.06x = 1,066,595.27
  5. Step 5: Solve for x
    x = 1,066,595.27/1,424.06
  6. Step 6: Final answer
    x = 748.98

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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.