Home / 2,665.68-3,678.60-1,720.56

Finding the Fourth Proportional to 2,665.68, 3,678.60 and 1,720.56

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Solution

The fourth proportional to 2,665.68, 3,678.60 and 1,720.56 is: 2,374.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665.68 : 3,678.60 = 1,720.56 : x
  2. Step 2: Convert to fraction form
    2,665.68/3,678.60 = 1,720.56/x
  3. Step 3: Cross multiply
    2,665.68x = 3,678.60 × 1,720.56
  4. Step 4: Simplify right side
    2,665.68x = 6,329,252.02
  5. Step 5: Solve for x
    x = 6,329,252.02/2,665.68
  6. Step 6: Final answer
    x = 2,374.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.