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Finding the Third Proportional to 315,811 and 485,430.75

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Solution

The third proportional to 315,811 and 485,430.75 is: 746,152.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,811 : 485,430.75 = 485,430.75 : x
  2. Step 2: Convert to fraction form
    315,811/485,430.75 = 485,430.75/x
  3. Step 3: Cross multiply
    315,811x = 485,430.75 × 485,430.75
  4. Step 4: Simplify right side
    315,811x = 235,643,013,045.56
  5. Step 5: Solve for x
    x = 235,643,013,045.56/315,811
  6. Step 6: Final answer
    x = 746,152.01

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.