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Finding the Fourth Proportional to 1,394, 1,923.76 and 773.04

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Solution

The fourth proportional to 1,394, 1,923.76 and 773.04 is: 1,066.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394 : 1,923.76 = 773.04 : x
  2. Step 2: Convert to fraction form
    1,394/1,923.76 = 773.04/x
  3. Step 3: Cross multiply
    1,394x = 1,923.76 × 773.04
  4. Step 4: Simplify right side
    1,394x = 1,487,143.43
  5. Step 5: Solve for x
    x = 1,487,143.43/1,394
  6. Step 6: Final answer
    x = 1,066.82

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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.