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Finding the Fourth Proportional to 665.63, 998.62 and 357.42

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Solution

The fourth proportional to 665.63, 998.62 and 357.42 is: 536.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.63 : 998.62 = 357.42 : x
  2. Step 2: Convert to fraction form
    665.63/998.62 = 357.42/x
  3. Step 3: Cross multiply
    665.63x = 998.62 × 357.42
  4. Step 4: Simplify right side
    665.63x = 356,926.76
  5. Step 5: Solve for x
    x = 356,926.76/665.63
  6. Step 6: Final answer
    x = 536.22

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Double scale
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1.5x scale

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.