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Finding the Fourth Proportional to 2,912.60, 4,368.90 and 2,797.40

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Solution

The fourth proportional to 2,912.60, 4,368.90 and 2,797.40 is: 4,196.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.60 : 4,368.90 = 2,797.40 : x
  2. Step 2: Convert to fraction form
    2,912.60/4,368.90 = 2,797.40/x
  3. Step 3: Cross multiply
    2,912.60x = 4,368.90 × 2,797.40
  4. Step 4: Simplify right side
    2,912.60x = 12,221,560.86
  5. Step 5: Solve for x
    x = 12,221,560.86/2,912.60
  6. Step 6: Final answer
    x = 4,196.10

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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.