Home / 2,977.20-4,476.60-2,912.40

Finding the Fourth Proportional to 2,977.20, 4,476.60 and 2,912.40

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Solution

The fourth proportional to 2,977.20, 4,476.60 and 2,912.40 is: 4,379.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,977.20 : 4,476.60 = 2,912.40 : x
  2. Step 2: Convert to fraction form
    2,977.20/4,476.60 = 2,912.40/x
  3. Step 3: Cross multiply
    2,977.20x = 4,476.60 × 2,912.40
  4. Step 4: Simplify right side
    2,977.20x = 13,037,649.84
  5. Step 5: Solve for x
    x = 13,037,649.84/2,977.20
  6. Step 6: Final answer
    x = 4,379.16

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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.