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Finding the Fourth Proportional to 4,945.89, 7,420.05 and 3,487.89

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Solution

The fourth proportional to 4,945.89, 7,420.05 and 3,487.89 is: 5,232.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,945.89 : 7,420.05 = 3,487.89 : x
  2. Step 2: Convert to fraction form
    4,945.89/7,420.05 = 3,487.89/x
  3. Step 3: Cross multiply
    4,945.89x = 7,420.05 × 3,487.89
  4. Step 4: Simplify right side
    4,945.89x = 25,880,318.19
  5. Step 5: Solve for x
    x = 25,880,318.19/4,945.89
  6. Step 6: Final answer
    x = 5,232.69

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1.5x scale

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.