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Finding the Fourth Proportional to 3,898.40, 5,846.90 and 1,124.39

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Solution

The fourth proportional to 3,898.40, 5,846.90 and 1,124.39 is: 1,686.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.40 : 5,846.90 = 1,124.39 : x
  2. Step 2: Convert to fraction form
    3,898.40/5,846.90 = 1,124.39/x
  3. Step 3: Cross multiply
    3,898.40x = 5,846.90 × 1,124.39
  4. Step 4: Simplify right side
    3,898.40x = 6,574,190.27
  5. Step 5: Solve for x
    x = 6,574,190.27/3,898.40
  6. Step 6: Final answer
    x = 1,686.38

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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.