Home / 5,216.40-7,199.10-2,978.28

Finding the Fourth Proportional to 5,216.40, 7,199.10 and 2,978.28

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Solution

The fourth proportional to 5,216.40, 7,199.10 and 2,978.28 is: 4,110.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,216.40 : 7,199.10 = 2,978.28 : x
  2. Step 2: Convert to fraction form
    5,216.40/7,199.10 = 2,978.28/x
  3. Step 3: Cross multiply
    5,216.40x = 7,199.10 × 2,978.28
  4. Step 4: Simplify right side
    5,216.40x = 21,440,935.55
  5. Step 5: Solve for x
    x = 21,440,935.55/5,216.40
  6. Step 6: Final answer
    x = 4,110.29

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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.