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Finding the Fourth Proportional to 879,796.80, 1,214,121.60 and 477,388.80

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Solution

The fourth proportional to 879,796.80, 1,214,121.60 and 477,388.80 is: 658,797.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,796.80 : 1,214,121.60 = 477,388.80 : x
  2. Step 2: Convert to fraction form
    879,796.80/1,214,121.60 = 477,388.80/x
  3. Step 3: Cross multiply
    879,796.80x = 1,214,121.60 × 477,388.80
  4. Step 4: Simplify right side
    879,796.80x = 579,608,053,678.08
  5. Step 5: Solve for x
    x = 579,608,053,678.08/879,796.80
  6. Step 6: Final answer
    x = 658,797.64

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.