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Finding the Third Proportional to 451,316 and 991,570

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Solution

The third proportional to 451,316 and 991,570 is: 2,178,542.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,316 : 991,570 = 991,570 : x
  2. Step 2: Convert to fraction form
    451,316/991,570 = 991,570/x
  3. Step 3: Cross multiply
    451,316x = 991,570 × 991,570
  4. Step 4: Simplify right side
    451,316x = 983,211,064,900
  5. Step 5: Solve for x
    x = 983,211,064,900/451,316
  6. Step 6: Final answer
    x = 2,178,542.45

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.