Home / 2,689.60-4,018.77-1,945.68

Finding the Fourth Proportional to 2,689.60, 4,018.77 and 1,945.68

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Solution

The fourth proportional to 2,689.60, 4,018.77 and 1,945.68 is: 2,907.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.60 : 4,018.77 = 1,945.68 : x
  2. Step 2: Convert to fraction form
    2,689.60/4,018.77 = 1,945.68/x
  3. Step 3: Cross multiply
    2,689.60x = 4,018.77 × 1,945.68
  4. Step 4: Simplify right side
    2,689.60x = 7,819,240.41
  5. Step 5: Solve for x
    x = 7,819,240.41/2,689.60
  6. Step 6: Final answer
    x = 2,907.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.