Home / 3,109.61-4,291.85-1,784.18

Finding the Fourth Proportional to 3,109.61, 4,291.85 and 1,784.18

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Solution

The fourth proportional to 3,109.61, 4,291.85 and 1,784.18 is: 2,462.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.61 : 4,291.85 = 1,784.18 : x
  2. Step 2: Convert to fraction form
    3,109.61/4,291.85 = 1,784.18/x
  3. Step 3: Cross multiply
    3,109.61x = 4,291.85 × 1,784.18
  4. Step 4: Simplify right side
    3,109.61x = 7,657,448.12
  5. Step 5: Solve for x
    x = 7,657,448.12/3,109.61
  6. Step 6: Final answer
    x = 2,462.51

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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.