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Finding the Fourth Proportional to 1,678.51, 2,511.44 and 1,507.99

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Solution

The fourth proportional to 1,678.51, 2,511.44 and 1,507.99 is: 2,256.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.51 : 2,511.44 = 1,507.99 : x
  2. Step 2: Convert to fraction form
    1,678.51/2,511.44 = 1,507.99/x
  3. Step 3: Cross multiply
    1,678.51x = 2,511.44 × 1,507.99
  4. Step 4: Simplify right side
    1,678.51x = 3,787,230.01
  5. Step 5: Solve for x
    x = 3,787,230.01/1,678.51
  6. Step 6: Final answer
    x = 2,256.30

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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.