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Finding the Fourth Proportional to 885.63, 1,322.12 and 739.43

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Solution

The fourth proportional to 885.63, 1,322.12 and 739.43 is: 1,103.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.63 : 1,322.12 = 739.43 : x
  2. Step 2: Convert to fraction form
    885.63/1,322.12 = 739.43/x
  3. Step 3: Cross multiply
    885.63x = 1,322.12 × 739.43
  4. Step 4: Simplify right side
    885.63x = 977,604.88
  5. Step 5: Solve for x
    x = 977,604.88/885.63
  6. Step 6: Final answer
    x = 1,103.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.