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Finding the Fourth Proportional to 1,152.22, 1,728.96 and 666.22

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Solution

The fourth proportional to 1,152.22, 1,728.96 and 666.22 is: 999.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.22 : 1,728.96 = 666.22 : x
  2. Step 2: Convert to fraction form
    1,152.22/1,728.96 = 666.22/x
  3. Step 3: Cross multiply
    1,152.22x = 1,728.96 × 666.22
  4. Step 4: Simplify right side
    1,152.22x = 1,151,867.73
  5. Step 5: Solve for x
    x = 1,151,867.73/1,152.22
  6. Step 6: Final answer
    x = 999.69

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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.