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Finding the Fourth Proportional to 5,216.40, 7,201.80 and 4,040.40

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Solution

The fourth proportional to 5,216.40, 7,201.80 and 4,040.40 is: 5,578.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,216.40 : 7,201.80 = 4,040.40 : x
  2. Step 2: Convert to fraction form
    5,216.40/7,201.80 = 4,040.40/x
  3. Step 3: Cross multiply
    5,216.40x = 7,201.80 × 4,040.40
  4. Step 4: Simplify right side
    5,216.40x = 29,098,152.72
  5. Step 5: Solve for x
    x = 29,098,152.72/5,216.40
  6. Step 6: Final answer
    x = 5,578.21

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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.