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Finding the Fourth Proportional to 357.68, 493.65 and 210.40

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Solution

The fourth proportional to 357.68, 493.65 and 210.40 is: 290.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.68 : 493.65 = 210.40 : x
  2. Step 2: Convert to fraction form
    357.68/493.65 = 210.40/x
  3. Step 3: Cross multiply
    357.68x = 493.65 × 210.40
  4. Step 4: Simplify right side
    357.68x = 103,863.96
  5. Step 5: Solve for x
    x = 103,863.96/357.68
  6. Step 6: Final answer
    x = 290.38

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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.