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Finding the Fourth Proportional to 1,394.06, 1,923.82 and 764.58

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Solution

The fourth proportional to 1,394.06, 1,923.82 and 764.58 is: 1,055.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.06 : 1,923.82 = 764.58 : x
  2. Step 2: Convert to fraction form
    1,394.06/1,923.82 = 764.58/x
  3. Step 3: Cross multiply
    1,394.06x = 1,923.82 × 764.58
  4. Step 4: Simplify right side
    1,394.06x = 1,470,917.19
  5. Step 5: Solve for x
    x = 1,470,917.19/1,394.06
  6. Step 6: Final answer
    x = 1,055.13

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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.