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Finding the Third Proportional to 4,290 and 9,280.50

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Solution

The third proportional to 4,290 and 9,280.50 is: 20,076.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,290 : 9,280.50 = 9,280.50 : x
  2. Step 2: Convert to fraction form
    4,290/9,280.50 = 9,280.50/x
  3. Step 3: Cross multiply
    4,290x = 9,280.50 × 9,280.50
  4. Step 4: Simplify right side
    4,290x = 86,127,680.25
  5. Step 5: Solve for x
    x = 86,127,680.25/4,290
  6. Step 6: Final answer
    x = 20,076.38

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.