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Finding the Fourth Proportional to 647.53, 893.58 and 352.80

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Solution

The fourth proportional to 647.53, 893.58 and 352.80 is: 486.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.53 : 893.58 = 352.80 : x
  2. Step 2: Convert to fraction form
    647.53/893.58 = 352.80/x
  3. Step 3: Cross multiply
    647.53x = 893.58 × 352.80
  4. Step 4: Simplify right side
    647.53x = 315,255.02
  5. Step 5: Solve for x
    x = 315,255.02/647.53
  6. Step 6: Final answer
    x = 486.86

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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.