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Finding the Fourth Proportional to 3,407.85, 4,702.81 and 1,992.51

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Solution

The fourth proportional to 3,407.85, 4,702.81 and 1,992.51 is: 2,749.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,407.85 : 4,702.81 = 1,992.51 : x
  2. Step 2: Convert to fraction form
    3,407.85/4,702.81 = 1,992.51/x
  3. Step 3: Cross multiply
    3,407.85x = 4,702.81 × 1,992.51
  4. Step 4: Simplify right side
    3,407.85x = 9,370,395.95
  5. Step 5: Solve for x
    x = 9,370,395.95/3,407.85
  6. Step 6: Final answer
    x = 2,749.65

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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.