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Finding the Fourth Proportional to 778.84, 1,074.84 and 429.56

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Solution

The fourth proportional to 778.84, 1,074.84 and 429.56 is: 592.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.84 : 1,074.84 = 429.56 : x
  2. Step 2: Convert to fraction form
    778.84/1,074.84 = 429.56/x
  3. Step 3: Cross multiply
    778.84x = 1,074.84 × 429.56
  4. Step 4: Simplify right side
    778.84x = 461,708.27
  5. Step 5: Solve for x
    x = 461,708.27/778.84
  6. Step 6: Final answer
    x = 592.82

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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.