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Finding the Fourth Proportional to 647.58, 893.64 and 554.22

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Solution

The fourth proportional to 647.58, 893.64 and 554.22 is: 764.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.58 : 893.64 = 554.22 : x
  2. Step 2: Convert to fraction form
    647.58/893.64 = 554.22/x
  3. Step 3: Cross multiply
    647.58x = 893.64 × 554.22
  4. Step 4: Simplify right side
    647.58x = 495,273.16
  5. Step 5: Solve for x
    x = 495,273.16/647.58
  6. Step 6: Final answer
    x = 764.81

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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.