Home / 1,634.15-2,255.85-971.21

Finding the Fourth Proportional to 1,634.15, 2,255.85 and 971.21

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Solution

The fourth proportional to 1,634.15, 2,255.85 and 971.21 is: 1,340.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,634.15 : 2,255.85 = 971.21 : x
  2. Step 2: Convert to fraction form
    1,634.15/2,255.85 = 971.21/x
  3. Step 3: Cross multiply
    1,634.15x = 2,255.85 × 971.21
  4. Step 4: Simplify right side
    1,634.15x = 2,190,892.80
  5. Step 5: Solve for x
    x = 2,190,892.80/1,634.15
  6. Step 6: Final answer
    x = 1,340.70

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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.