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Finding the Fourth Proportional to 4,784.78, 6,602.10 and 2,688.50

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Solution

The fourth proportional to 4,784.78, 6,602.10 and 2,688.50 is: 3,709.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,784.78 : 6,602.10 = 2,688.50 : x
  2. Step 2: Convert to fraction form
    4,784.78/6,602.10 = 2,688.50/x
  3. Step 3: Cross multiply
    4,784.78x = 6,602.10 × 2,688.50
  4. Step 4: Simplify right side
    4,784.78x = 17,749,745.85
  5. Step 5: Solve for x
    x = 17,749,745.85/4,784.78
  6. Step 6: Final answer
    x = 3,709.63

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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.