Home / 3,412.38-5,118.60-947.40

Finding the Fourth Proportional to 3,412.38, 5,118.60 and 947.40

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Solution

The fourth proportional to 3,412.38, 5,118.60 and 947.40 is: 1,421.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.38 : 5,118.60 = 947.40 : x
  2. Step 2: Convert to fraction form
    3,412.38/5,118.60 = 947.40/x
  3. Step 3: Cross multiply
    3,412.38x = 5,118.60 × 947.40
  4. Step 4: Simplify right side
    3,412.38x = 4,849,361.64
  5. Step 5: Solve for x
    x = 4,849,361.64/3,412.38
  6. Step 6: Final answer
    x = 1,421.11

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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.