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Finding the Fourth Proportional to 1,071.63, 1,607.61 and 331.18

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Solution

The fourth proportional to 1,071.63, 1,607.61 and 331.18 is: 496.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.63 : 1,607.61 = 331.18 : x
  2. Step 2: Convert to fraction form
    1,071.63/1,607.61 = 331.18/x
  3. Step 3: Cross multiply
    1,071.63x = 1,607.61 × 331.18
  4. Step 4: Simplify right side
    1,071.63x = 532,412.30
  5. Step 5: Solve for x
    x = 532,412.30/1,071.63
  6. Step 6: Final answer
    x = 496.82

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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.