Home / 428,729.51-643,094.73-108,905.37

Finding the Fourth Proportional to 428,729.51, 643,094.73 and 108,905.37

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Solution

The fourth proportional to 428,729.51, 643,094.73 and 108,905.37 is: 163,358.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,729.51 : 643,094.73 = 108,905.37 : x
  2. Step 2: Convert to fraction form
    428,729.51/643,094.73 = 108,905.37/x
  3. Step 3: Cross multiply
    428,729.51x = 643,094.73 × 108,905.37
  4. Step 4: Simplify right side
    428,729.51x = 70,036,467,058.54
  5. Step 5: Solve for x
    x = 70,036,467,058.54/428,729.51
  6. Step 6: Final answer
    x = 163,358.17

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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.