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Finding the Fourth Proportional to 3,316.95, 4,999.42 and 3,168.72

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Solution

The fourth proportional to 3,316.95, 4,999.42 and 3,168.72 is: 4,776.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,316.95 : 4,999.42 = 3,168.72 : x
  2. Step 2: Convert to fraction form
    3,316.95/4,999.42 = 3,168.72/x
  3. Step 3: Cross multiply
    3,316.95x = 4,999.42 × 3,168.72
  4. Step 4: Simplify right side
    3,316.95x = 15,841,766.10
  5. Step 5: Solve for x
    x = 15,841,766.10/3,316.95
  6. Step 6: Final answer
    x = 4,776.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.