Home / 428,993,076-643,393,848.24-198,932,266.56

Finding the Fourth Proportional to 428,993,076, 643,393,848.24 and 198,932,266.56

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Solution

The fourth proportional to 428,993,076, 643,393,848.24 and 198,932,266.56 is: 298,353,991.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,993,076 : 643,393,848.24 = 198,932,266.56 : x
  2. Step 2: Convert to fraction form
    428,993,076/643,393,848.24 = 198,932,266.56/x
  3. Step 3: Cross multiply
    428,993,076x = 643,393,848.24 × 198,932,266.56
  4. Step 4: Simplify right side
    428,993,076x = 127,991,796,521,143,872
  5. Step 5: Solve for x
    x = 127,991,796,521,143,872/428,993,076
  6. Step 6: Final answer
    x = 298,353,991.43

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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.