Home / 2,140.66-3,210.67-1,777.78

Finding the Fourth Proportional to 2,140.66, 3,210.67 and 1,777.78

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Solution

The fourth proportional to 2,140.66, 3,210.67 and 1,777.78 is: 2,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.66 : 3,210.67 = 1,777.78 : x
  2. Step 2: Convert to fraction form
    2,140.66/3,210.67 = 1,777.78/x
  3. Step 3: Cross multiply
    2,140.66x = 3,210.67 × 1,777.78
  4. Step 4: Simplify right side
    2,140.66x = 5,707,864.91
  5. Step 5: Solve for x
    x = 5,707,864.91/2,140.66
  6. Step 6: Final answer
    x = 2,666.40

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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.