Home / 3,109.76-4,290.08-1,783.20

Finding the Fourth Proportional to 3,109.76, 4,290.08 and 1,783.20

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Solution

The fourth proportional to 3,109.76, 4,290.08 and 1,783.20 is: 2,460.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.76 : 4,290.08 = 1,783.20 : x
  2. Step 2: Convert to fraction form
    3,109.76/4,290.08 = 1,783.20/x
  3. Step 3: Cross multiply
    3,109.76x = 4,290.08 × 1,783.20
  4. Step 4: Simplify right side
    3,109.76x = 7,650,070.66
  5. Step 5: Solve for x
    x = 7,650,070.66/3,109.76
  6. Step 6: Final answer
    x = 2,460.02

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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.