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Finding the Fourth Proportional to 2,985.71, 4,120.41 and 1,659.38

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Solution

The fourth proportional to 2,985.71, 4,120.41 and 1,659.38 is: 2,290.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.71 : 4,120.41 = 1,659.38 : x
  2. Step 2: Convert to fraction form
    2,985.71/4,120.41 = 1,659.38/x
  3. Step 3: Cross multiply
    2,985.71x = 4,120.41 × 1,659.38
  4. Step 4: Simplify right side
    2,985.71x = 6,837,305.34
  5. Step 5: Solve for x
    x = 6,837,305.34/2,985.71
  6. Step 6: Final answer
    x = 2,290.01

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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.