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Finding the Fourth Proportional to 1,549.94, 2,139.22 and 960.74

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Solution

The fourth proportional to 1,549.94, 2,139.22 and 960.74 is: 1,326.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.94 : 2,139.22 = 960.74 : x
  2. Step 2: Convert to fraction form
    1,549.94/2,139.22 = 960.74/x
  3. Step 3: Cross multiply
    1,549.94x = 2,139.22 × 960.74
  4. Step 4: Simplify right side
    1,549.94x = 2,055,234.22
  5. Step 5: Solve for x
    x = 2,055,234.22/1,549.94
  6. Step 6: Final answer
    x = 1,326.01

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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.