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Finding the Fourth Proportional to 1,336.16, 2,003.88 and 605

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Solution

The fourth proportional to 1,336.16, 2,003.88 and 605 is: 907.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.16 : 2,003.88 = 605 : x
  2. Step 2: Convert to fraction form
    1,336.16/2,003.88 = 605/x
  3. Step 3: Cross multiply
    1,336.16x = 2,003.88 × 605
  4. Step 4: Simplify right side
    1,336.16x = 1,212,347.40
  5. Step 5: Solve for x
    x = 1,212,347.40/1,336.16
  6. Step 6: Final answer
    x = 907.34

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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.