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Finding the Fourth Proportional to 388.30, 579.69 and 372.10

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Solution

The fourth proportional to 388.30, 579.69 and 372.10 is: 555.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.30 : 579.69 = 372.10 : x
  2. Step 2: Convert to fraction form
    388.30/579.69 = 372.10/x
  3. Step 3: Cross multiply
    388.30x = 579.69 × 372.10
  4. Step 4: Simplify right side
    388.30x = 215,702.65
  5. Step 5: Solve for x
    x = 215,702.65/388.30
  6. Step 6: Final answer
    x = 555.51

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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.