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Finding the Fourth Proportional to 262.29, 393.60 and 99.99

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Solution

The fourth proportional to 262.29, 393.60 and 99.99 is: 150.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.29 : 393.60 = 99.99 : x
  2. Step 2: Convert to fraction form
    262.29/393.60 = 99.99/x
  3. Step 3: Cross multiply
    262.29x = 393.60 × 99.99
  4. Step 4: Simplify right side
    262.29x = 39,356.06
  5. Step 5: Solve for x
    x = 39,356.06/262.29
  6. Step 6: Final answer
    x = 150.05

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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.