Home / 4,272.78-6,404.79-1,639.58

Finding the Fourth Proportional to 4,272.78, 6,404.79 and 1,639.58

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Solution

The fourth proportional to 4,272.78, 6,404.79 and 1,639.58 is: 2,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,272.78 : 6,404.79 = 1,639.58 : x
  2. Step 2: Convert to fraction form
    4,272.78/6,404.79 = 1,639.58/x
  3. Step 3: Cross multiply
    4,272.78x = 6,404.79 × 1,639.58
  4. Step 4: Simplify right side
    4,272.78x = 10,501,133.56
  5. Step 5: Solve for x
    x = 10,501,133.56/4,272.78
  6. Step 6: Final answer
    x = 2,457.68

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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.