Home / 2,985.89-4,120.54-1,659.71

Finding the Fourth Proportional to 2,985.89, 4,120.54 and 1,659.71

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Solution

The fourth proportional to 2,985.89, 4,120.54 and 1,659.71 is: 2,290.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.89 : 4,120.54 = 1,659.71 : x
  2. Step 2: Convert to fraction form
    2,985.89/4,120.54 = 1,659.71/x
  3. Step 3: Cross multiply
    2,985.89x = 4,120.54 × 1,659.71
  4. Step 4: Simplify right side
    2,985.89x = 6,838,907.60
  5. Step 5: Solve for x
    x = 6,838,907.60/2,985.89
  6. Step 6: Final answer
    x = 2,290.41

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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.