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Finding the Fourth Proportional to 386.84, 577.25 and 377.57

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Solution

The fourth proportional to 386.84, 577.25 and 377.57 is: 563.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.84 : 577.25 = 377.57 : x
  2. Step 2: Convert to fraction form
    386.84/577.25 = 377.57/x
  3. Step 3: Cross multiply
    386.84x = 577.25 × 377.57
  4. Step 4: Simplify right side
    386.84x = 217,952.28
  5. Step 5: Solve for x
    x = 217,952.28/386.84
  6. Step 6: Final answer
    x = 563.42

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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.