Home / 5,428.42-7,490.78-3,190.39

Finding the Fourth Proportional to 5,428.42, 7,490.78 and 3,190.39

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Solution

The fourth proportional to 5,428.42, 7,490.78 and 3,190.39 is: 4,402.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.42 : 7,490.78 = 3,190.39 : x
  2. Step 2: Convert to fraction form
    5,428.42/7,490.78 = 3,190.39/x
  3. Step 3: Cross multiply
    5,428.42x = 7,490.78 × 3,190.39
  4. Step 4: Simplify right side
    5,428.42x = 23,898,486.89
  5. Step 5: Solve for x
    x = 23,898,486.89/5,428.42
  6. Step 6: Final answer
    x = 4,402.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.