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Finding the Fourth Proportional to 5,615.55, 8,420.49 and 1,719.45

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Solution

The fourth proportional to 5,615.55, 8,420.49 and 1,719.45 is: 2,578.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.55 : 8,420.49 = 1,719.45 : x
  2. Step 2: Convert to fraction form
    5,615.55/8,420.49 = 1,719.45/x
  3. Step 3: Cross multiply
    5,615.55x = 8,420.49 × 1,719.45
  4. Step 4: Simplify right side
    5,615.55x = 14,478,611.53
  5. Step 5: Solve for x
    x = 14,478,611.53/5,615.55
  6. Step 6: Final answer
    x = 2,578.31

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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.