Home / 3,412.60-5,118.90-947.42

Finding the Fourth Proportional to 3,412.60, 5,118.90 and 947.42

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Solution

The fourth proportional to 3,412.60, 5,118.90 and 947.42 is: 1,421.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.60 : 5,118.90 = 947.42 : x
  2. Step 2: Convert to fraction form
    3,412.60/5,118.90 = 947.42/x
  3. Step 3: Cross multiply
    3,412.60x = 5,118.90 × 947.42
  4. Step 4: Simplify right side
    3,412.60x = 4,849,738.29
  5. Step 5: Solve for x
    x = 4,849,738.29/3,412.60
  6. Step 6: Final answer
    x = 1,421.13

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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.