Home / 1,647.15-2,272.85-938.91

Finding the Fourth Proportional to 1,647.15, 2,272.85 and 938.91

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Solution

The fourth proportional to 1,647.15, 2,272.85 and 938.91 is: 1,295.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647.15 : 2,272.85 = 938.91 : x
  2. Step 2: Convert to fraction form
    1,647.15/2,272.85 = 938.91/x
  3. Step 3: Cross multiply
    1,647.15x = 2,272.85 × 938.91
  4. Step 4: Simplify right side
    1,647.15x = 2,133,996.90
  5. Step 5: Solve for x
    x = 2,133,996.90/1,647.15
  6. Step 6: Final answer
    x = 1,295.57

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1.5x scale

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.