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Finding the Fourth Proportional to 2,391.80, 3,590.40 and 1,846.40

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Solution

The fourth proportional to 2,391.80, 3,590.40 and 1,846.40 is: 2,771.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.80 : 3,590.40 = 1,846.40 : x
  2. Step 2: Convert to fraction form
    2,391.80/3,590.40 = 1,846.40/x
  3. Step 3: Cross multiply
    2,391.80x = 3,590.40 × 1,846.40
  4. Step 4: Simplify right side
    2,391.80x = 6,629,314.56
  5. Step 5: Solve for x
    x = 6,629,314.56/2,391.80
  6. Step 6: Final answer
    x = 2,771.68

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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.