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Finding the Fourth Proportional to 2,609.52, 3,914.30 and 661.73

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Solution

The fourth proportional to 2,609.52, 3,914.30 and 661.73 is: 992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,609.52 : 3,914.30 = 661.73 : x
  2. Step 2: Convert to fraction form
    2,609.52/3,914.30 = 661.73/x
  3. Step 3: Cross multiply
    2,609.52x = 3,914.30 × 661.73
  4. Step 4: Simplify right side
    2,609.52x = 2,590,206.50
  5. Step 5: Solve for x
    x = 2,590,206.50/2,609.52
  6. Step 6: Final answer
    x = 992.60

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1.5x scale

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.