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Finding the Fourth Proportional to 3,985.46, 5,499.90 and 2,192.90

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Solution

The fourth proportional to 3,985.46, 5,499.90 and 2,192.90 is: 3,026.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.46 : 5,499.90 = 2,192.90 : x
  2. Step 2: Convert to fraction form
    3,985.46/5,499.90 = 2,192.90/x
  3. Step 3: Cross multiply
    3,985.46x = 5,499.90 × 2,192.90
  4. Step 4: Simplify right side
    3,985.46x = 12,060,730.71
  5. Step 5: Solve for x
    x = 12,060,730.71/3,985.46
  6. Step 6: Final answer
    x = 3,026.18

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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.