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Finding the Third Proportional to 647 and 924.50

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Solution

The third proportional to 647 and 924.50 is: 1,321.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    647 : 924.50 = 924.50 : x
  2. Step 2: Convert to fraction form
    647/924.50 = 924.50/x
  3. Step 3: Cross multiply
    647x = 924.50 × 924.50
  4. Step 4: Simplify right side
    647x = 854,700.25
  5. Step 5: Solve for x
    x = 854,700.25/647
  6. Step 6: Final answer
    x = 1,321.02

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.