Home / 4,742.40-7,113.72-1,279.62

Finding the Fourth Proportional to 4,742.40, 7,113.72 and 1,279.62

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Solution

The fourth proportional to 4,742.40, 7,113.72 and 1,279.62 is: 1,919.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,742.40 : 7,113.72 = 1,279.62 : x
  2. Step 2: Convert to fraction form
    4,742.40/7,113.72 = 1,279.62/x
  3. Step 3: Cross multiply
    4,742.40x = 7,113.72 × 1,279.62
  4. Step 4: Simplify right side
    4,742.40x = 9,102,858.39
  5. Step 5: Solve for x
    x = 9,102,858.39/4,742.40
  6. Step 6: Final answer
    x = 1,919.46

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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.