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Finding the Fourth Proportional to 3,392.78, 4,681.98 and 1,900.69

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Solution

The fourth proportional to 3,392.78, 4,681.98 and 1,900.69 is: 2,622.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,392.78 : 4,681.98 = 1,900.69 : x
  2. Step 2: Convert to fraction form
    3,392.78/4,681.98 = 1,900.69/x
  3. Step 3: Cross multiply
    3,392.78x = 4,681.98 × 1,900.69
  4. Step 4: Simplify right side
    3,392.78x = 8,898,975.01
  5. Step 5: Solve for x
    x = 8,898,975.01/3,392.78
  6. Step 6: Final answer
    x = 2,622.92

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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.