Home / 666,630,104.79-919,949,224.64-398,705,932.63

Finding the Fourth Proportional to 666,630,104.79, 919,949,224.64 and 398,705,932.63

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Solution

The fourth proportional to 666,630,104.79, 919,949,224.64 and 398,705,932.63 is: 550,213,995.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,630,104.79 : 919,949,224.64 = 398,705,932.63 : x
  2. Step 2: Convert to fraction form
    666,630,104.79/919,949,224.64 = 398,705,932.63/x
  3. Step 3: Cross multiply
    666,630,104.79x = 919,949,224.64 × 398,705,932.63
  4. Step 4: Simplify right side
    666,630,104.79x = 366,789,213,578,043,136
  5. Step 5: Solve for x
    x = 366,789,213,578,043,136/666,630,104.79
  6. Step 6: Final answer
    x = 550,213,995.65

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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.