Home / 2,834.78-3,911.12-1,655

Finding the Fourth Proportional to 2,834.78, 3,911.12 and 1,655

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Solution

The fourth proportional to 2,834.78, 3,911.12 and 1,655 is: 2,283.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,834.78 : 3,911.12 = 1,655 : x
  2. Step 2: Convert to fraction form
    2,834.78/3,911.12 = 1,655/x
  3. Step 3: Cross multiply
    2,834.78x = 3,911.12 × 1,655
  4. Step 4: Simplify right side
    2,834.78x = 6,472,903.60
  5. Step 5: Solve for x
    x = 6,472,903.60/2,834.78
  6. Step 6: Final answer
    x = 2,283.39

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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.