Home / 3,109.42-4,290.87-1,712.08

Finding the Fourth Proportional to 3,109.42, 4,290.87 and 1,712.08

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Solution

The fourth proportional to 3,109.42, 4,290.87 and 1,712.08 is: 2,362.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.42 : 4,290.87 = 1,712.08 : x
  2. Step 2: Convert to fraction form
    3,109.42/4,290.87 = 1,712.08/x
  3. Step 3: Cross multiply
    3,109.42x = 4,290.87 × 1,712.08
  4. Step 4: Simplify right side
    3,109.42x = 7,346,312.71
  5. Step 5: Solve for x
    x = 7,346,312.71/3,109.42
  6. Step 6: Final answer
    x = 2,362.60

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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.