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Finding the Fourth Proportional to 2,762.08, 4,142.21 and 912.85

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Solution

The fourth proportional to 2,762.08, 4,142.21 and 912.85 is: 1,368.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,762.08 : 4,142.21 = 912.85 : x
  2. Step 2: Convert to fraction form
    2,762.08/4,142.21 = 912.85/x
  3. Step 3: Cross multiply
    2,762.08x = 4,142.21 × 912.85
  4. Step 4: Simplify right side
    2,762.08x = 3,781,204.29
  5. Step 5: Solve for x
    x = 3,781,204.29/2,762.08
  6. Step 6: Final answer
    x = 1,368.97

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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.