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Finding the Fourth Proportional to 357.87, 493.71 and 210.45

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Solution

The fourth proportional to 357.87, 493.71 and 210.45 is: 290.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.87 : 493.71 = 210.45 : x
  2. Step 2: Convert to fraction form
    357.87/493.71 = 210.45/x
  3. Step 3: Cross multiply
    357.87x = 493.71 × 210.45
  4. Step 4: Simplify right side
    357.87x = 103,901.27
  5. Step 5: Solve for x
    x = 103,901.27/357.87
  6. Step 6: Final answer
    x = 290.33

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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.