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Finding the Fourth Proportional to 357.86, 493.71 and 208.47

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Solution

The fourth proportional to 357.86, 493.71 and 208.47 is: 287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.86 : 493.71 = 208.47 : x
  2. Step 2: Convert to fraction form
    357.86/493.71 = 208.47/x
  3. Step 3: Cross multiply
    357.86x = 493.71 × 208.47
  4. Step 4: Simplify right side
    357.86x = 102,921.84
  5. Step 5: Solve for x
    x = 102,921.84/357.86
  6. Step 6: Final answer
    x = 287.60

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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.