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Finding the Fourth Proportional to 1,394, 1,923.20 and 804.32

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Solution

The fourth proportional to 1,394, 1,923.20 and 804.32 is: 1,109.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394 : 1,923.20 = 804.32 : x
  2. Step 2: Convert to fraction form
    1,394/1,923.20 = 804.32/x
  3. Step 3: Cross multiply
    1,394x = 1,923.20 × 804.32
  4. Step 4: Simplify right side
    1,394x = 1,546,868.22
  5. Step 5: Solve for x
    x = 1,546,868.22/1,394
  6. Step 6: Final answer
    x = 1,109.66

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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.