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Finding the Third Proportional to 405,969.75 and 631,051.50

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Solution

The third proportional to 405,969.75 and 631,051.50 is: 980,925.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,969.75 : 631,051.50 = 631,051.50 : x
  2. Step 2: Convert to fraction form
    405,969.75/631,051.50 = 631,051.50/x
  3. Step 3: Cross multiply
    405,969.75x = 631,051.50 × 631,051.50
  4. Step 4: Simplify right side
    405,969.75x = 398,225,995,652.25
  5. Step 5: Solve for x
    x = 398,225,995,652.25/405,969.75
  6. Step 6: Final answer
    x = 980,925.29

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.