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Finding the Fourth Proportional to 1,071.05, 1,606.57 and 660.33

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Solution

The fourth proportional to 1,071.05, 1,606.57 and 660.33 is: 990.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.05 : 1,606.57 = 660.33 : x
  2. Step 2: Convert to fraction form
    1,071.05/1,606.57 = 660.33/x
  3. Step 3: Cross multiply
    1,071.05x = 1,606.57 × 660.33
  4. Step 4: Simplify right side
    1,071.05x = 1,060,864.72
  5. Step 5: Solve for x
    x = 1,060,864.72/1,071.05
  6. Step 6: Final answer
    x = 990.50

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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.