Home / 3,110.10-4,664.70-918.72

Finding the Fourth Proportional to 3,110.10, 4,664.70 and 918.72

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Solution

The fourth proportional to 3,110.10, 4,664.70 and 918.72 is: 1,377.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.10 : 4,664.70 = 918.72 : x
  2. Step 2: Convert to fraction form
    3,110.10/4,664.70 = 918.72/x
  3. Step 3: Cross multiply
    3,110.10x = 4,664.70 × 918.72
  4. Step 4: Simplify right side
    3,110.10x = 4,285,553.18
  5. Step 5: Solve for x
    x = 4,285,553.18/3,110.10
  6. Step 6: Final answer
    x = 1,377.95

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1.5x scale

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.