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Finding the Third Proportional to 586.25 and 1,280.50

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Solution

The third proportional to 586.25 and 1,280.50 is: 2,796.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.25 : 1,280.50 = 1,280.50 : x
  2. Step 2: Convert to fraction form
    586.25/1,280.50 = 1,280.50/x
  3. Step 3: Cross multiply
    586.25x = 1,280.50 × 1,280.50
  4. Step 4: Simplify right side
    586.25x = 1,639,680.25
  5. Step 5: Solve for x
    x = 1,639,680.25/586.25
  6. Step 6: Final answer
    x = 2,796.90

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.