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Finding the Fourth Proportional to 5,130.33, 7,696.51 and 1,620.88

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Solution

The fourth proportional to 5,130.33, 7,696.51 and 1,620.88 is: 2,431.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.33 : 7,696.51 = 1,620.88 : x
  2. Step 2: Convert to fraction form
    5,130.33/7,696.51 = 1,620.88/x
  3. Step 3: Cross multiply
    5,130.33x = 7,696.51 × 1,620.88
  4. Step 4: Simplify right side
    5,130.33x = 12,475,095.84
  5. Step 5: Solve for x
    x = 12,475,095.84/5,130.33
  6. Step 6: Final answer
    x = 2,431.64

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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.