Home / 2,985.84-4,120.38-1,659.60

Finding the Fourth Proportional to 2,985.84, 4,120.38 and 1,659.60

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Solution

The fourth proportional to 2,985.84, 4,120.38 and 1,659.60 is: 2,290.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.84 : 4,120.38 = 1,659.60 : x
  2. Step 2: Convert to fraction form
    2,985.84/4,120.38 = 1,659.60/x
  3. Step 3: Cross multiply
    2,985.84x = 4,120.38 × 1,659.60
  4. Step 4: Simplify right side
    2,985.84x = 6,838,182.65
  5. Step 5: Solve for x
    x = 6,838,182.65/2,985.84
  6. Step 6: Final answer
    x = 2,290.20

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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.