Home / 3,115.15-4,298.55-1,788.82

Finding the Fourth Proportional to 3,115.15, 4,298.55 and 1,788.82

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Solution

The fourth proportional to 3,115.15, 4,298.55 and 1,788.82 is: 2,468.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.15 : 4,298.55 = 1,788.82 : x
  2. Step 2: Convert to fraction form
    3,115.15/4,298.55 = 1,788.82/x
  3. Step 3: Cross multiply
    3,115.15x = 4,298.55 × 1,788.82
  4. Step 4: Simplify right side
    3,115.15x = 7,689,332.21
  5. Step 5: Solve for x
    x = 7,689,332.21/3,115.15
  6. Step 6: Final answer
    x = 2,468.37

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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.