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Finding the Fourth Proportional to 5,199.37, 7,800.07 and 1,688.72

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Solution

The fourth proportional to 5,199.37, 7,800.07 and 1,688.72 is: 2,533.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,199.37 : 7,800.07 = 1,688.72 : x
  2. Step 2: Convert to fraction form
    5,199.37/7,800.07 = 1,688.72/x
  3. Step 3: Cross multiply
    5,199.37x = 7,800.07 × 1,688.72
  4. Step 4: Simplify right side
    5,199.37x = 13,172,134.21
  5. Step 5: Solve for x
    x = 13,172,134.21/5,199.37
  6. Step 6: Final answer
    x = 2,533.41

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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.