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Finding the Fourth Proportional to 2,620.52, 3,612.12 and 1,988.99

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Solution

The fourth proportional to 2,620.52, 3,612.12 and 1,988.99 is: 2,741.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.52 : 3,612.12 = 1,988.99 : x
  2. Step 2: Convert to fraction form
    2,620.52/3,612.12 = 1,988.99/x
  3. Step 3: Cross multiply
    2,620.52x = 3,612.12 × 1,988.99
  4. Step 4: Simplify right side
    2,620.52x = 7,184,470.56
  5. Step 5: Solve for x
    x = 7,184,470.56/2,620.52
  6. Step 6: Final answer
    x = 2,741.62

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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.