Home / 3,106.95-4,287.63-1,690.65

Finding the Fourth Proportional to 3,106.95, 4,287.63 and 1,690.65

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Solution

The fourth proportional to 3,106.95, 4,287.63 and 1,690.65 is: 2,333.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.95 : 4,287.63 = 1,690.65 : x
  2. Step 2: Convert to fraction form
    3,106.95/4,287.63 = 1,690.65/x
  3. Step 3: Cross multiply
    3,106.95x = 4,287.63 × 1,690.65
  4. Step 4: Simplify right side
    3,106.95x = 7,248,881.66
  5. Step 5: Solve for x
    x = 7,248,881.66/3,106.95
  6. Step 6: Final answer
    x = 2,333.12

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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.