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Finding the Fourth Proportional to 2,760.85, 4,141.61 and 912.49

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Solution

The fourth proportional to 2,760.85, 4,141.61 and 912.49 is: 1,368.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,760.85 : 4,141.61 = 912.49 : x
  2. Step 2: Convert to fraction form
    2,760.85/4,141.61 = 912.49/x
  3. Step 3: Cross multiply
    2,760.85x = 4,141.61 × 912.49
  4. Step 4: Simplify right side
    2,760.85x = 3,779,166.21
  5. Step 5: Solve for x
    x = 3,779,166.21/2,760.85
  6. Step 6: Final answer
    x = 1,368.84

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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.