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Finding the Fourth Proportional to 321,840.20, 451,509.40 and 321,840.20

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Solution

The fourth proportional to 321,840.20, 451,509.40 and 321,840.20 is: 451,509.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,840.20 : 451,509.40 = 321,840.20 : x
  2. Step 2: Convert to fraction form
    321,840.20/451,509.40 = 321,840.20/x
  3. Step 3: Cross multiply
    321,840.20x = 451,509.40 × 321,840.20
  4. Step 4: Simplify right side
    321,840.20x = 145,313,875,597.88
  5. Step 5: Solve for x
    x = 145,313,875,597.88/321,840.20
  6. Step 6: Final answer
    x = 451,509.40

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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.