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Finding the Fourth Proportional to 2,720.00, 4,079.80 and 870.63

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Solution

The fourth proportional to 2,720.00, 4,079.80 and 870.63 is: 1,305.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.00 : 4,079.80 = 870.63 : x
  2. Step 2: Convert to fraction form
    2,720.00/4,079.80 = 870.63/x
  3. Step 3: Cross multiply
    2,720.00x = 4,079.80 × 870.63
  4. Step 4: Simplify right side
    2,720.00x = 3,551,982.06
  5. Step 5: Solve for x
    x = 3,551,982.06/2,720.00
  6. Step 6: Final answer
    x = 1,305.87

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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.