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Finding the Fourth Proportional to 1,059.69, 1,587.11 and 999.75

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Solution

The fourth proportional to 1,059.69, 1,587.11 and 999.75 is: 1,497.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.69 : 1,587.11 = 999.75 : x
  2. Step 2: Convert to fraction form
    1,059.69/1,587.11 = 999.75/x
  3. Step 3: Cross multiply
    1,059.69x = 1,587.11 × 999.75
  4. Step 4: Simplify right side
    1,059.69x = 1,586,708.22
  5. Step 5: Solve for x
    x = 1,586,708.22/1,059.69
  6. Step 6: Final answer
    x = 1,497.33

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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.