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Finding the Fourth Proportional to 1,060.22, 1,581.63 and 985.64

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Solution

The fourth proportional to 1,060.22, 1,581.63 and 985.64 is: 1,470.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.22 : 1,581.63 = 985.64 : x
  2. Step 2: Convert to fraction form
    1,060.22/1,581.63 = 985.64/x
  3. Step 3: Cross multiply
    1,060.22x = 1,581.63 × 985.64
  4. Step 4: Simplify right side
    1,060.22x = 1,558,917.79
  5. Step 5: Solve for x
    x = 1,558,917.79/1,060.22
  6. Step 6: Final answer
    x = 1,470.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.