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Finding the Fourth Proportional to 647.46, 893.50 and 352.76

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Solution

The fourth proportional to 647.46, 893.50 and 352.76 is: 486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.46 : 893.50 = 352.76 : x
  2. Step 2: Convert to fraction form
    647.46/893.50 = 352.76/x
  3. Step 3: Cross multiply
    647.46x = 893.50 × 352.76
  4. Step 4: Simplify right side
    647.46x = 315,185.71
  5. Step 5: Solve for x
    x = 315,185.71/647.46
  6. Step 6: Final answer
    x = 486.80

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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.