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Finding the Fourth Proportional to 1,015.57, 1,401.49 and 549.82

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Solution

The fourth proportional to 1,015.57, 1,401.49 and 549.82 is: 758.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.57 : 1,401.49 = 549.82 : x
  2. Step 2: Convert to fraction form
    1,015.57/1,401.49 = 549.82/x
  3. Step 3: Cross multiply
    1,015.57x = 1,401.49 × 549.82
  4. Step 4: Simplify right side
    1,015.57x = 770,569.36
  5. Step 5: Solve for x
    x = 770,569.36/1,015.57
  6. Step 6: Final answer
    x = 758.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.