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Finding the Fourth Proportional to 388.10, 535.80 and 377.18

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Solution

The fourth proportional to 388.10, 535.80 and 377.18 is: 520.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.10 : 535.80 = 377.18 : x
  2. Step 2: Convert to fraction form
    388.10/535.80 = 377.18/x
  3. Step 3: Cross multiply
    388.10x = 535.80 × 377.18
  4. Step 4: Simplify right side
    388.10x = 202,093.04
  5. Step 5: Solve for x
    x = 202,093.04/388.10
  6. Step 6: Final answer
    x = 520.72

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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.