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Finding the Third Proportional to 216,391.50 and 302,656.50

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Solution

The third proportional to 216,391.50 and 302,656.50 is: 423,311.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,391.50 : 302,656.50 = 302,656.50 : x
  2. Step 2: Convert to fraction form
    216,391.50/302,656.50 = 302,656.50/x
  3. Step 3: Cross multiply
    216,391.50x = 302,656.50 × 302,656.50
  4. Step 4: Simplify right side
    216,391.50x = 91,600,956,992.25
  5. Step 5: Solve for x
    x = 91,600,956,992.25/216,391.50
  6. Step 6: Final answer
    x = 423,311.25

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.