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Finding the Fourth Proportional to 1,755.20, 2,422.20 and 969.32

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Solution

The fourth proportional to 1,755.20, 2,422.20 and 969.32 is: 1,337.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,755.20 : 2,422.20 = 969.32 : x
  2. Step 2: Convert to fraction form
    1,755.20/2,422.20 = 969.32/x
  3. Step 3: Cross multiply
    1,755.20x = 2,422.20 × 969.32
  4. Step 4: Simplify right side
    1,755.20x = 2,347,886.90
  5. Step 5: Solve for x
    x = 2,347,886.90/1,755.20
  6. Step 6: Final answer
    x = 1,337.67

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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.