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Finding the Fourth Proportional to 526.99, 727.09 and 305.81

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Solution

The fourth proportional to 526.99, 727.09 and 305.81 is: 421.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.99 : 727.09 = 305.81 : x
  2. Step 2: Convert to fraction form
    526.99/727.09 = 305.81/x
  3. Step 3: Cross multiply
    526.99x = 727.09 × 305.81
  4. Step 4: Simplify right side
    526.99x = 222,351.39
  5. Step 5: Solve for x
    x = 222,351.39/526.99
  6. Step 6: Final answer
    x = 421.93

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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.