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Finding the Fourth Proportional to 1,071.66, 1,605.05 and 552.11

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Solution

The fourth proportional to 1,071.66, 1,605.05 and 552.11 is: 826.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.66 : 1,605.05 = 552.11 : x
  2. Step 2: Convert to fraction form
    1,071.66/1,605.05 = 552.11/x
  3. Step 3: Cross multiply
    1,071.66x = 1,605.05 × 552.11
  4. Step 4: Simplify right side
    1,071.66x = 886,153.37
  5. Step 5: Solve for x
    x = 886,153.37/1,071.66
  6. Step 6: Final answer
    x = 826.90

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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.