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Finding the Fourth Proportional to 2,685.85, 4,018.42 and 1,645.63

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Solution

The fourth proportional to 2,685.85, 4,018.42 and 1,645.63 is: 2,462.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.85 : 4,018.42 = 1,645.63 : x
  2. Step 2: Convert to fraction form
    2,685.85/4,018.42 = 1,645.63/x
  3. Step 3: Cross multiply
    2,685.85x = 4,018.42 × 1,645.63
  4. Step 4: Simplify right side
    2,685.85x = 6,612,832.50
  5. Step 5: Solve for x
    x = 6,612,832.50/2,685.85
  6. Step 6: Final answer
    x = 2,462.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.