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Finding the Third Proportional to 319,808 and 477,120

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Solution

The third proportional to 319,808 and 477,120 is: 711,813.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,808 : 477,120 = 477,120 : x
  2. Step 2: Convert to fraction form
    319,808/477,120 = 477,120/x
  3. Step 3: Cross multiply
    319,808x = 477,120 × 477,120
  4. Step 4: Simplify right side
    319,808x = 227,643,494,400
  5. Step 5: Solve for x
    x = 227,643,494,400/319,808
  6. Step 6: Final answer
    x = 711,813.01

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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.