Home / 3,115.15-4,298.90-1,717.90

Finding the Fourth Proportional to 3,115.15, 4,298.90 and 1,717.90

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Solution

The fourth proportional to 3,115.15, 4,298.90 and 1,717.90 is: 2,370.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.15 : 4,298.90 = 1,717.90 : x
  2. Step 2: Convert to fraction form
    3,115.15/4,298.90 = 1,717.90/x
  3. Step 3: Cross multiply
    3,115.15x = 4,298.90 × 1,717.90
  4. Step 4: Simplify right side
    3,115.15x = 7,385,080.31
  5. Step 5: Solve for x
    x = 7,385,080.31/3,115.15
  6. Step 6: Final answer
    x = 2,370.70

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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.