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Finding the Fourth Proportional to 647.77, 893.79 and 382.15

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Solution

The fourth proportional to 647.77, 893.79 and 382.15 is: 527.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.77 : 893.79 = 382.15 : x
  2. Step 2: Convert to fraction form
    647.77/893.79 = 382.15/x
  3. Step 3: Cross multiply
    647.77x = 893.79 × 382.15
  4. Step 4: Simplify right side
    647.77x = 341,561.85
  5. Step 5: Solve for x
    x = 341,561.85/647.77
  6. Step 6: Final answer
    x = 527.29

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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.