Home / 4,212.70-6,319.80-1,438.72

Finding the Fourth Proportional to 4,212.70, 6,319.80 and 1,438.72

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Solution

The fourth proportional to 4,212.70, 6,319.80 and 1,438.72 is: 2,158.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,212.70 : 6,319.80 = 1,438.72 : x
  2. Step 2: Convert to fraction form
    4,212.70/6,319.80 = 1,438.72/x
  3. Step 3: Cross multiply
    4,212.70x = 6,319.80 × 1,438.72
  4. Step 4: Simplify right side
    4,212.70x = 9,092,442.93
  5. Step 5: Solve for x
    x = 9,092,442.93/4,212.70
  6. Step 6: Final answer
    x = 2,158.34

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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.