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Finding the Fourth Proportional to 357.90, 493.86 and 210.57

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Solution

The fourth proportional to 357.90, 493.86 and 210.57 is: 290.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.90 : 493.86 = 210.57 : x
  2. Step 2: Convert to fraction form
    357.90/493.86 = 210.57/x
  3. Step 3: Cross multiply
    357.90x = 493.86 × 210.57
  4. Step 4: Simplify right side
    357.90x = 103,992.10
  5. Step 5: Solve for x
    x = 103,992.10/357.90
  6. Step 6: Final answer
    x = 290.56

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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.