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Finding the Third Proportional to 30,438 and 45,330.75

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Solution

The third proportional to 30,438 and 45,330.75 is: 67,510.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438 : 45,330.75 = 45,330.75 : x
  2. Step 2: Convert to fraction form
    30,438/45,330.75 = 45,330.75/x
  3. Step 3: Cross multiply
    30,438x = 45,330.75 × 45,330.75
  4. Step 4: Simplify right side
    30,438x = 2,054,876,895.56
  5. Step 5: Solve for x
    x = 2,054,876,895.56/30,438
  6. Step 6: Final answer
    x = 67,510.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.