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Finding the Fourth Proportional to 388.81, 539.05 and 369.04

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Solution

The fourth proportional to 388.81, 539.05 and 369.04 is: 511.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.81 : 539.05 = 369.04 : x
  2. Step 2: Convert to fraction form
    388.81/539.05 = 369.04/x
  3. Step 3: Cross multiply
    388.81x = 539.05 × 369.04
  4. Step 4: Simplify right side
    388.81x = 198,931.01
  5. Step 5: Solve for x
    x = 198,931.01/388.81
  6. Step 6: Final answer
    x = 511.64

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.