Home / 1,651.64-2,279.28-905.66

Finding the Fourth Proportional to 1,651.64, 2,279.28 and 905.66

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Solution

The fourth proportional to 1,651.64, 2,279.28 and 905.66 is: 1,249.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.64 : 2,279.28 = 905.66 : x
  2. Step 2: Convert to fraction form
    1,651.64/2,279.28 = 905.66/x
  3. Step 3: Cross multiply
    1,651.64x = 2,279.28 × 905.66
  4. Step 4: Simplify right side
    1,651.64x = 2,064,252.72
  5. Step 5: Solve for x
    x = 2,064,252.72/1,651.64
  6. Step 6: Final answer
    x = 1,249.82

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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.