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Finding the Fourth Proportional to 1,073.84, 1,610.74 and 638.08

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Solution

The fourth proportional to 1,073.84, 1,610.74 and 638.08 is: 957.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.84 : 1,610.74 = 638.08 : x
  2. Step 2: Convert to fraction form
    1,073.84/1,610.74 = 638.08/x
  3. Step 3: Cross multiply
    1,073.84x = 1,610.74 × 638.08
  4. Step 4: Simplify right side
    1,073.84x = 1,027,780.98
  5. Step 5: Solve for x
    x = 1,027,780.98/1,073.84
  6. Step 6: Final answer
    x = 957.11

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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.