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Finding the Fourth Proportional to 388.28, 536.81 and 294.87

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Solution

The fourth proportional to 388.28, 536.81 and 294.87 is: 407.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.28 : 536.81 = 294.87 : x
  2. Step 2: Convert to fraction form
    388.28/536.81 = 294.87/x
  3. Step 3: Cross multiply
    388.28x = 536.81 × 294.87
  4. Step 4: Simplify right side
    388.28x = 158,287.69
  5. Step 5: Solve for x
    x = 158,287.69/388.28
  6. Step 6: Final answer
    x = 407.67

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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.