Home / 2,147.14-3,220.83-666.50

Finding the Fourth Proportional to 2,147.14, 3,220.83 and 666.50

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Solution

The fourth proportional to 2,147.14, 3,220.83 and 666.50 is: 999.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.14 : 3,220.83 = 666.50 : x
  2. Step 2: Convert to fraction form
    2,147.14/3,220.83 = 666.50/x
  3. Step 3: Cross multiply
    2,147.14x = 3,220.83 × 666.50
  4. Step 4: Simplify right side
    2,147.14x = 2,146,681.67
  5. Step 5: Solve for x
    x = 2,146,681.67/2,147.14
  6. Step 6: Final answer
    x = 999.79

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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.