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Finding the Fourth Proportional to 578.94, 798.75 and 357.81

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Solution

The fourth proportional to 578.94, 798.75 and 357.81 is: 493.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.94 : 798.75 = 357.81 : x
  2. Step 2: Convert to fraction form
    578.94/798.75 = 357.81/x
  3. Step 3: Cross multiply
    578.94x = 798.75 × 357.81
  4. Step 4: Simplify right side
    578.94x = 285,800.74
  5. Step 5: Solve for x
    x = 285,800.74/578.94
  6. Step 6: Final answer
    x = 493.66

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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.