Home / 393,984,654.80-590,976,982.20-121,319,992.40

Finding the Fourth Proportional to 393,984,654.80, 590,976,982.20 and 121,319,992.40

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Solution

The fourth proportional to 393,984,654.80, 590,976,982.20 and 121,319,992.40 is: 181,979,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,984,654.80 : 590,976,982.20 = 121,319,992.40 : x
  2. Step 2: Convert to fraction form
    393,984,654.80/590,976,982.20 = 121,319,992.40/x
  3. Step 3: Cross multiply
    393,984,654.80x = 590,976,982.20 × 121,319,992.40
  4. Step 4: Simplify right side
    393,984,654.80x = 71,697,322,989,078,944
  5. Step 5: Solve for x
    x = 71,697,322,989,078,944/393,984,654.80
  6. Step 6: Final answer
    x = 181,979,988.60

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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.