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Finding the Fourth Proportional to 638,338,852.80, 957,508,279.20 and 365,485,233.60

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Solution

The fourth proportional to 638,338,852.80, 957,508,279.20 and 365,485,233.60 is: 548,227,850.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,338,852.80 : 957,508,279.20 = 365,485,233.60 : x
  2. Step 2: Convert to fraction form
    638,338,852.80/957,508,279.20 = 365,485,233.60/x
  3. Step 3: Cross multiply
    638,338,852.80x = 957,508,279.20 × 365,485,233.60
  4. Step 4: Simplify right side
    638,338,852.80x = 349,955,137,097,346,048
  5. Step 5: Solve for x
    x = 349,955,137,097,346,048/638,338,852.80
  6. Step 6: Final answer
    x = 548,227,850.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.