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Finding the Fourth Proportional to 320,105,059.20, 449,356,406.40 and 320,105,059.20

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Solution

The fourth proportional to 320,105,059.20, 449,356,406.40 and 320,105,059.20 is: 449,356,406.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,105,059.20 : 449,356,406.40 = 320,105,059.20 : x
  2. Step 2: Convert to fraction form
    320,105,059.20/449,356,406.40 = 320,105,059.20/x
  3. Step 3: Cross multiply
    320,105,059.20x = 449,356,406.40 × 320,105,059.20
  4. Step 4: Simplify right side
    320,105,059.20x = 143,841,259,072,571,248
  5. Step 5: Solve for x
    x = 143,841,259,072,571,248/320,105,059.20
  6. Step 6: Final answer
    x = 449,356,406.40

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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.