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Finding the Fourth Proportional to 663.66, 995.64 and 355.35

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Solution

The fourth proportional to 663.66, 995.64 and 355.35 is: 533.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.66 : 995.64 = 355.35 : x
  2. Step 2: Convert to fraction form
    663.66/995.64 = 355.35/x
  3. Step 3: Cross multiply
    663.66x = 995.64 × 355.35
  4. Step 4: Simplify right side
    663.66x = 353,800.67
  5. Step 5: Solve for x
    x = 353,800.67/663.66
  6. Step 6: Final answer
    x = 533.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.