Home / 3,412.30-5,118.42-947.11

Finding the Fourth Proportional to 3,412.30, 5,118.42 and 947.11

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Solution

The fourth proportional to 3,412.30, 5,118.42 and 947.11 is: 1,420.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.30 : 5,118.42 = 947.11 : x
  2. Step 2: Convert to fraction form
    3,412.30/5,118.42 = 947.11/x
  3. Step 3: Cross multiply
    3,412.30x = 5,118.42 × 947.11
  4. Step 4: Simplify right side
    3,412.30x = 4,847,706.77
  5. Step 5: Solve for x
    x = 4,847,706.77/3,412.30
  6. Step 6: Final answer
    x = 1,420.66

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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.