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Finding the Fourth Proportional to 1,949.68, 2,925 and 651.16

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Solution

The fourth proportional to 1,949.68, 2,925 and 651.16 is: 976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.68 : 2,925 = 651.16 : x
  2. Step 2: Convert to fraction form
    1,949.68/2,925 = 651.16/x
  3. Step 3: Cross multiply
    1,949.68x = 2,925 × 651.16
  4. Step 4: Simplify right side
    1,949.68x = 1,904,643
  5. Step 5: Solve for x
    x = 1,904,643/1,949.68
  6. Step 6: Final answer
    x = 976.90

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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.