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Finding the Fourth Proportional to 1,536.51, 2,119.92 and 907.09

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Solution

The fourth proportional to 1,536.51, 2,119.92 and 907.09 is: 1,251.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.51 : 2,119.92 = 907.09 : x
  2. Step 2: Convert to fraction form
    1,536.51/2,119.92 = 907.09/x
  3. Step 3: Cross multiply
    1,536.51x = 2,119.92 × 907.09
  4. Step 4: Simplify right side
    1,536.51x = 1,922,958.23
  5. Step 5: Solve for x
    x = 1,922,958.23/1,536.51
  6. Step 6: Final answer
    x = 1,251.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.