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Finding the Fourth Proportional to 2,685.47, 3,704.08 and 1,890.45

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Solution

The fourth proportional to 2,685.47, 3,704.08 and 1,890.45 is: 2,607.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.47 : 3,704.08 = 1,890.45 : x
  2. Step 2: Convert to fraction form
    2,685.47/3,704.08 = 1,890.45/x
  3. Step 3: Cross multiply
    2,685.47x = 3,704.08 × 1,890.45
  4. Step 4: Simplify right side
    2,685.47x = 7,002,378.04
  5. Step 5: Solve for x
    x = 7,002,378.04/2,685.47
  6. Step 6: Final answer
    x = 2,607.51

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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.