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Finding the Fourth Proportional to 2,156.54, 3,234.93 and 617.50

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Solution

The fourth proportional to 2,156.54, 3,234.93 and 617.50 is: 926.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.54 : 3,234.93 = 617.50 : x
  2. Step 2: Convert to fraction form
    2,156.54/3,234.93 = 617.50/x
  3. Step 3: Cross multiply
    2,156.54x = 3,234.93 × 617.50
  4. Step 4: Simplify right side
    2,156.54x = 1,997,569.28
  5. Step 5: Solve for x
    x = 1,997,569.28/2,156.54
  6. Step 6: Final answer
    x = 926.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.