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Finding the Fourth Proportional to 1,319,179,990.90, 1,978,266,101.55 and 398,750,422.90

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Solution

The fourth proportional to 1,319,179,990.90, 1,978,266,101.55 and 398,750,422.90 is: 597,973,324.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,179,990.90 : 1,978,266,101.55 = 398,750,422.90 : x
  2. Step 2: Convert to fraction form
    1,319,179,990.90/1,978,266,101.55 = 398,750,422.90/x
  3. Step 3: Cross multiply
    1,319,179,990.90x = 1,978,266,101.55 × 398,750,422.90
  4. Step 4: Simplify right side
    1,319,179,990.90x = 788,834,444,601,796,736
  5. Step 5: Solve for x
    x = 788,834,444,601,796,736/1,319,179,990.90
  6. Step 6: Final answer
    x = 597,973,324.37

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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.