Home / 428,754,731.64-643,162,837.11-179,509,172.37

Finding the Fourth Proportional to 428,754,731.64, 643,162,837.11 and 179,509,172.37

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Solution

The fourth proportional to 428,754,731.64, 643,162,837.11 and 179,509,172.37 is: 269,276,628.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,754,731.64 : 643,162,837.11 = 179,509,172.37 : x
  2. Step 2: Convert to fraction form
    428,754,731.64/643,162,837.11 = 179,509,172.37/x
  3. Step 3: Cross multiply
    428,754,731.64x = 643,162,837.11 × 179,509,172.37
  4. Step 4: Simplify right side
    428,754,731.64x = 115,453,628,584,643,872
  5. Step 5: Solve for x
    x = 115,453,628,584,643,872/428,754,731.64
  6. Step 6: Final answer
    x = 269,276,628.49

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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.