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Finding the Fourth Proportional to 1,043.91, 1,567.80 and 986.60

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Solution

The fourth proportional to 1,043.91, 1,567.80 and 986.60 is: 1,481.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.91 : 1,567.80 = 986.60 : x
  2. Step 2: Convert to fraction form
    1,043.91/1,567.80 = 986.60/x
  3. Step 3: Cross multiply
    1,043.91x = 1,567.80 × 986.60
  4. Step 4: Simplify right side
    1,043.91x = 1,546,795.40
  5. Step 5: Solve for x
    x = 1,546,795.40/1,043.91
  6. Step 6: Final answer
    x = 1,481.73

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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.