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Finding the Fourth Proportional to 2,900.40, 3,994.56 and 2,846.40

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Solution

The fourth proportional to 2,900.40, 3,994.56 and 2,846.40 is: 3,920.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.40 : 3,994.56 = 2,846.40 : x
  2. Step 2: Convert to fraction form
    2,900.40/3,994.56 = 2,846.40/x
  3. Step 3: Cross multiply
    2,900.40x = 3,994.56 × 2,846.40
  4. Step 4: Simplify right side
    2,900.40x = 11,370,115.58
  5. Step 5: Solve for x
    x = 11,370,115.58/2,900.40
  6. Step 6: Final answer
    x = 3,920.19

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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.