Home / 393,984,852.80-590,977,279.20-121,320,190.40

Finding the Fourth Proportional to 393,984,852.80, 590,977,279.20 and 121,320,190.40

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Solution

The fourth proportional to 393,984,852.80, 590,977,279.20 and 121,320,190.40 is: 181,980,285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,984,852.80 : 590,977,279.20 = 121,320,190.40 : x
  2. Step 2: Convert to fraction form
    393,984,852.80/590,977,279.20 = 121,320,190.40/x
  3. Step 3: Cross multiply
    393,984,852.80x = 590,977,279.20 × 121,320,190.40
  4. Step 4: Simplify right side
    393,984,852.80x = 71,697,476,034,617,968
  5. Step 5: Solve for x
    x = 71,697,476,034,617,968/393,984,852.80
  6. Step 6: Final answer
    x = 181,980,285.60

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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.