Home / 3,412.40-5,118.42-947.30

Finding the Fourth Proportional to 3,412.40, 5,118.42 and 947.30

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Solution

The fourth proportional to 3,412.40, 5,118.42 and 947.30 is: 1,420.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.40 : 5,118.42 = 947.30 : x
  2. Step 2: Convert to fraction form
    3,412.40/5,118.42 = 947.30/x
  3. Step 3: Cross multiply
    3,412.40x = 5,118.42 × 947.30
  4. Step 4: Simplify right side
    3,412.40x = 4,848,679.27
  5. Step 5: Solve for x
    x = 4,848,679.27/3,412.40
  6. Step 6: Final answer
    x = 1,420.90

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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.