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Finding the Fourth Proportional to 358, 493.96 and 210.64

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Solution

The fourth proportional to 358, 493.96 and 210.64 is: 290.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    358 : 493.96 = 210.64 : x
  2. Step 2: Convert to fraction form
    358/493.96 = 210.64/x
  3. Step 3: Cross multiply
    358x = 493.96 × 210.64
  4. Step 4: Simplify right side
    358x = 104,047.73
  5. Step 5: Solve for x
    x = 104,047.73/358
  6. Step 6: Final answer
    x = 290.64

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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.