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Finding the Fourth Proportional to 647.13, 893.01 and 381.57

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Solution

The fourth proportional to 647.13, 893.01 and 381.57 is: 526.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.13 : 893.01 = 381.57 : x
  2. Step 2: Convert to fraction form
    647.13/893.01 = 381.57/x
  3. Step 3: Cross multiply
    647.13x = 893.01 × 381.57
  4. Step 4: Simplify right side
    647.13x = 340,745.83
  5. Step 5: Solve for x
    x = 340,745.83/647.13
  6. Step 6: Final answer
    x = 526.55

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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.