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Finding the Third Proportional to 430.75 and 653.75

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Solution

The third proportional to 430.75 and 653.75 is: 992.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.75 : 653.75 = 653.75 : x
  2. Step 2: Convert to fraction form
    430.75/653.75 = 653.75/x
  3. Step 3: Cross multiply
    430.75x = 653.75 × 653.75
  4. Step 4: Simplify right side
    430.75x = 427,389.06
  5. Step 5: Solve for x
    x = 427,389.06/430.75
  6. Step 6: Final answer
    x = 992.20

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.