Home / 3,117.21-4,300.86-1,790.83

Finding the Fourth Proportional to 3,117.21, 4,300.86 and 1,790.83

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Solution

The fourth proportional to 3,117.21, 4,300.86 and 1,790.83 is: 2,470.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.21 : 4,300.86 = 1,790.83 : x
  2. Step 2: Convert to fraction form
    3,117.21/4,300.86 = 1,790.83/x
  3. Step 3: Cross multiply
    3,117.21x = 4,300.86 × 1,790.83
  4. Step 4: Simplify right side
    3,117.21x = 7,702,109.11
  5. Step 5: Solve for x
    x = 7,702,109.11/3,117.21
  6. Step 6: Final answer
    x = 2,470.83

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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.