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Finding the Fourth Proportional to 2,707.96, 4,061.90 and 859.02

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Solution

The fourth proportional to 2,707.96, 4,061.90 and 859.02 is: 1,288.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,707.96 : 4,061.90 = 859.02 : x
  2. Step 2: Convert to fraction form
    2,707.96/4,061.90 = 859.02/x
  3. Step 3: Cross multiply
    2,707.96x = 4,061.90 × 859.02
  4. Step 4: Simplify right side
    2,707.96x = 3,489,253.34
  5. Step 5: Solve for x
    x = 3,489,253.34/2,707.96
  6. Step 6: Final answer
    x = 1,288.52

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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.