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Finding the Third Proportional to 407.50 and 613.75

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Solution

The third proportional to 407.50 and 613.75 is: 924.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.50 : 613.75 = 613.75 : x
  2. Step 2: Convert to fraction form
    407.50/613.75 = 613.75/x
  3. Step 3: Cross multiply
    407.50x = 613.75 × 613.75
  4. Step 4: Simplify right side
    407.50x = 376,689.06
  5. Step 5: Solve for x
    x = 376,689.06/407.50
  6. Step 6: Final answer
    x = 924.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.