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Finding the Fourth Proportional to 2,043.72, 3,065.99 and 657.20

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Solution

The fourth proportional to 2,043.72, 3,065.99 and 657.20 is: 985.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,043.72 : 3,065.99 = 657.20 : x
  2. Step 2: Convert to fraction form
    2,043.72/3,065.99 = 657.20/x
  3. Step 3: Cross multiply
    2,043.72x = 3,065.99 × 657.20
  4. Step 4: Simplify right side
    2,043.72x = 2,014,973.01
  5. Step 5: Solve for x
    x = 2,014,973.01/2,043.72
  6. Step 6: Final answer
    x = 985.93

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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.