Home / 2,126.89-3,190.87-666.05

Finding the Fourth Proportional to 2,126.89, 3,190.87 and 666.05

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Solution

The fourth proportional to 2,126.89, 3,190.87 and 666.05 is: 999.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.89 : 3,190.87 = 666.05 : x
  2. Step 2: Convert to fraction form
    2,126.89/3,190.87 = 666.05/x
  3. Step 3: Cross multiply
    2,126.89x = 3,190.87 × 666.05
  4. Step 4: Simplify right side
    2,126.89x = 2,125,278.96
  5. Step 5: Solve for x
    x = 2,125,278.96/2,126.89
  6. Step 6: Final answer
    x = 999.24

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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.