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Finding the Fourth Proportional to 4,859.91, 7,289.90 and 1,938.21

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Solution

The fourth proportional to 4,859.91, 7,289.90 and 1,938.21 is: 2,907.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,859.91 : 7,289.90 = 1,938.21 : x
  2. Step 2: Convert to fraction form
    4,859.91/7,289.90 = 1,938.21/x
  3. Step 3: Cross multiply
    4,859.91x = 7,289.90 × 1,938.21
  4. Step 4: Simplify right side
    4,859.91x = 14,129,347.39
  5. Step 5: Solve for x
    x = 14,129,347.39/4,859.91
  6. Step 6: Final answer
    x = 2,907.33

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Similar ratio
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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.