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Finding the Fourth Proportional to 321,842.20, 451,512.20 and 321,842.20

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Solution

The fourth proportional to 321,842.20, 451,512.20 and 321,842.20 is: 451,512.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,842.20 : 451,512.20 = 321,842.20 : x
  2. Step 2: Convert to fraction form
    321,842.20/451,512.20 = 321,842.20/x
  3. Step 3: Cross multiply
    321,842.20x = 451,512.20 × 321,842.20
  4. Step 4: Simplify right side
    321,842.20x = 145,315,679,774.84
  5. Step 5: Solve for x
    x = 145,315,679,774.84/321,842.20
  6. Step 6: Final answer
    x = 451,512.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.