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Finding the Fourth Proportional to 1,322.30, 1,984.65 and 889.76

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Solution

The fourth proportional to 1,322.30, 1,984.65 and 889.76 is: 1,335.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.30 : 1,984.65 = 889.76 : x
  2. Step 2: Convert to fraction form
    1,322.30/1,984.65 = 889.76/x
  3. Step 3: Cross multiply
    1,322.30x = 1,984.65 × 889.76
  4. Step 4: Simplify right side
    1,322.30x = 1,765,862.18
  5. Step 5: Solve for x
    x = 1,765,862.18/1,322.30
  6. Step 6: Final answer
    x = 1,335.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.