Home / 3,106.65-4,287.20-1,690.35

Finding the Fourth Proportional to 3,106.65, 4,287.20 and 1,690.35

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Solution

The fourth proportional to 3,106.65, 4,287.20 and 1,690.35 is: 2,332.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.65 : 4,287.20 = 1,690.35 : x
  2. Step 2: Convert to fraction form
    3,106.65/4,287.20 = 1,690.35/x
  3. Step 3: Cross multiply
    3,106.65x = 4,287.20 × 1,690.35
  4. Step 4: Simplify right side
    3,106.65x = 7,246,868.52
  5. Step 5: Solve for x
    x = 7,246,868.52/3,106.65
  6. Step 6: Final answer
    x = 2,332.70

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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.