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Finding the Fourth Proportional to 1,293.01, 1,784.16 and 768.94

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Solution

The fourth proportional to 1,293.01, 1,784.16 and 768.94 is: 1,061.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.01 : 1,784.16 = 768.94 : x
  2. Step 2: Convert to fraction form
    1,293.01/1,784.16 = 768.94/x
  3. Step 3: Cross multiply
    1,293.01x = 1,784.16 × 768.94
  4. Step 4: Simplify right side
    1,293.01x = 1,371,907.53
  5. Step 5: Solve for x
    x = 1,371,907.53/1,293.01
  6. Step 6: Final answer
    x = 1,061.02

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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.