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Finding the Fourth Proportional to 1,338.49, 2,008.20 and 607.93

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Solution

The fourth proportional to 1,338.49, 2,008.20 and 607.93 is: 912.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.49 : 2,008.20 = 607.93 : x
  2. Step 2: Convert to fraction form
    1,338.49/2,008.20 = 607.93/x
  3. Step 3: Cross multiply
    1,338.49x = 2,008.20 × 607.93
  4. Step 4: Simplify right side
    1,338.49x = 1,220,845.03
  5. Step 5: Solve for x
    x = 1,220,845.03/1,338.49
  6. Step 6: Final answer
    x = 912.11

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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.