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Finding the Fourth Proportional to 1,081.12, 1,491.98 and 608.94

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Solution

The fourth proportional to 1,081.12, 1,491.98 and 608.94 is: 840.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.12 : 1,491.98 = 608.94 : x
  2. Step 2: Convert to fraction form
    1,081.12/1,491.98 = 608.94/x
  3. Step 3: Cross multiply
    1,081.12x = 1,491.98 × 608.94
  4. Step 4: Simplify right side
    1,081.12x = 908,526.30
  5. Step 5: Solve for x
    x = 908,526.30/1,081.12
  6. Step 6: Final answer
    x = 840.36

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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.