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Finding the Third Proportional to 317.25 and 607.50

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Solution

The third proportional to 317.25 and 607.50 is: 1,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.25 : 607.50 = 607.50 : x
  2. Step 2: Convert to fraction form
    317.25/607.50 = 607.50/x
  3. Step 3: Cross multiply
    317.25x = 607.50 × 607.50
  4. Step 4: Simplify right side
    317.25x = 369,056.25
  5. Step 5: Solve for x
    x = 369,056.25/317.25
  6. Step 6: Final answer
    x = 1,163.30

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Why These Related Problems?

These problems maintain the same ratio (1.91) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.