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Finding the Fourth Proportional to 357.71, 493.55 and 210.39

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Solution

The fourth proportional to 357.71, 493.55 and 210.39 is: 290.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.71 : 493.55 = 210.39 : x
  2. Step 2: Convert to fraction form
    357.71/493.55 = 210.39/x
  3. Step 3: Cross multiply
    357.71x = 493.55 × 210.39
  4. Step 4: Simplify right side
    357.71x = 103,837.98
  5. Step 5: Solve for x
    x = 103,837.98/357.71
  6. Step 6: Final answer
    x = 290.29

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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.