Home / 3,106.99-4,287.67-1,690.70

Finding the Fourth Proportional to 3,106.99, 4,287.67 and 1,690.70

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Solution

The fourth proportional to 3,106.99, 4,287.67 and 1,690.70 is: 2,333.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.99 : 4,287.67 = 1,690.70 : x
  2. Step 2: Convert to fraction form
    3,106.99/4,287.67 = 1,690.70/x
  3. Step 3: Cross multiply
    3,106.99x = 4,287.67 × 1,690.70
  4. Step 4: Simplify right side
    3,106.99x = 7,249,159.44
  5. Step 5: Solve for x
    x = 7,249,159.44/3,106.99
  6. Step 6: Final answer
    x = 2,333.18

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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.