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Finding the Fourth Proportional to 388.40, 535.82 and 277.83

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Solution

The fourth proportional to 388.40, 535.82 and 277.83 is: 383.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.40 : 535.82 = 277.83 : x
  2. Step 2: Convert to fraction form
    388.40/535.82 = 277.83/x
  3. Step 3: Cross multiply
    388.40x = 535.82 × 277.83
  4. Step 4: Simplify right side
    388.40x = 148,865.48
  5. Step 5: Solve for x
    x = 148,865.48/388.40
  6. Step 6: Final answer
    x = 383.28

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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.