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Finding the Fourth Proportional to 4,280, 6,401.47 and 2,520.81

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Solution

The fourth proportional to 4,280, 6,401.47 and 2,520.81 is: 3,770.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280 : 6,401.47 = 2,520.81 : x
  2. Step 2: Convert to fraction form
    4,280/6,401.47 = 2,520.81/x
  3. Step 3: Cross multiply
    4,280x = 6,401.47 × 2,520.81
  4. Step 4: Simplify right side
    4,280x = 16,136,889.59
  5. Step 5: Solve for x
    x = 16,136,889.59/4,280
  6. Step 6: Final answer
    x = 3,770.30

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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.