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Finding the Third Proportional to 405 and 923.91

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Solution

The third proportional to 405 and 923.91 is: 2,107.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    405 : 923.91 = 923.91 : x
  2. Step 2: Convert to fraction form
    405/923.91 = 923.91/x
  3. Step 3: Cross multiply
    405x = 923.91 × 923.91
  4. Step 4: Simplify right side
    405x = 853,602.76
  5. Step 5: Solve for x
    x = 853,602.76/405
  6. Step 6: Final answer
    x = 2,107.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.