Home / 3,106.79-4,287.30-1,690.50

Finding the Fourth Proportional to 3,106.79, 4,287.30 and 1,690.50

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Solution

The fourth proportional to 3,106.79, 4,287.30 and 1,690.50 is: 2,332.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.79 : 4,287.30 = 1,690.50 : x
  2. Step 2: Convert to fraction form
    3,106.79/4,287.30 = 1,690.50/x
  3. Step 3: Cross multiply
    3,106.79x = 4,287.30 × 1,690.50
  4. Step 4: Simplify right side
    3,106.79x = 7,247,690.39
  5. Step 5: Solve for x
    x = 7,247,690.39/3,106.79
  6. Step 6: Final answer
    x = 2,332.86

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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.