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Finding the Fourth Proportional to 5,129.91, 7,695.89 and 1,620.46

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Solution

The fourth proportional to 5,129.91, 7,695.89 and 1,620.46 is: 2,431.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.91 : 7,695.89 = 1,620.46 : x
  2. Step 2: Convert to fraction form
    5,129.91/7,695.89 = 1,620.46/x
  3. Step 3: Cross multiply
    5,129.91x = 7,695.89 × 1,620.46
  4. Step 4: Simplify right side
    5,129.91x = 12,470,881.91
  5. Step 5: Solve for x
    x = 12,470,881.91/5,129.91
  6. Step 6: Final answer
    x = 2,431.01

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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.