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Finding the Fourth Proportional to 2,615.70, 3,923.55 and 1,838.10

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Solution

The fourth proportional to 2,615.70, 3,923.55 and 1,838.10 is: 2,757.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.70 : 3,923.55 = 1,838.10 : x
  2. Step 2: Convert to fraction form
    2,615.70/3,923.55 = 1,838.10/x
  3. Step 3: Cross multiply
    2,615.70x = 3,923.55 × 1,838.10
  4. Step 4: Simplify right side
    2,615.70x = 7,211,877.26
  5. Step 5: Solve for x
    x = 7,211,877.26/2,615.70
  6. Step 6: Final answer
    x = 2,757.15

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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.