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Finding the Fourth Proportional to 1,013.85, 1,520.66 and 605.57

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Solution

The fourth proportional to 1,013.85, 1,520.66 and 605.57 is: 908.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.85 : 1,520.66 = 605.57 : x
  2. Step 2: Convert to fraction form
    1,013.85/1,520.66 = 605.57/x
  3. Step 3: Cross multiply
    1,013.85x = 1,520.66 × 605.57
  4. Step 4: Simplify right side
    1,013.85x = 920,859.99
  5. Step 5: Solve for x
    x = 920,859.99/1,013.85
  6. Step 6: Final answer
    x = 908.28

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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.