Home / 2,985.61-4,120.12-1,659.35

Finding the Fourth Proportional to 2,985.61, 4,120.12 and 1,659.35

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Solution

The fourth proportional to 2,985.61, 4,120.12 and 1,659.35 is: 2,289.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.61 : 4,120.12 = 1,659.35 : x
  2. Step 2: Convert to fraction form
    2,985.61/4,120.12 = 1,659.35/x
  3. Step 3: Cross multiply
    2,985.61x = 4,120.12 × 1,659.35
  4. Step 4: Simplify right side
    2,985.61x = 6,836,721.12
  5. Step 5: Solve for x
    x = 6,836,721.12/2,985.61
  6. Step 6: Final answer
    x = 2,289.89

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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.