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Finding the Fourth Proportional to 1,755.79, 2,422.75 and 969.84

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Solution

The fourth proportional to 1,755.79, 2,422.75 and 969.84 is: 1,338.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.79 : 2,422.75 = 969.84 : x
  2. Step 2: Convert to fraction form
    1,755.79/2,422.75 = 969.84/x
  3. Step 3: Cross multiply
    1,755.79x = 2,422.75 × 969.84
  4. Step 4: Simplify right side
    1,755.79x = 2,349,679.86
  5. Step 5: Solve for x
    x = 2,349,679.86/1,755.79
  6. Step 6: Final answer
    x = 1,338.25

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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.