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Finding the Fourth Proportional to 388.83, 579.50 and 388.23

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Solution

The fourth proportional to 388.83, 579.50 and 388.23 is: 578.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.83 : 579.50 = 388.23 : x
  2. Step 2: Convert to fraction form
    388.83/579.50 = 388.23/x
  3. Step 3: Cross multiply
    388.83x = 579.50 × 388.23
  4. Step 4: Simplify right side
    388.83x = 224,977.34
  5. Step 5: Solve for x
    x = 224,977.34/388.83
  6. Step 6: Final answer
    x = 578.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.