Home / 421,415.64-631,991.70-140,867.28

Finding the Fourth Proportional to 421,415.64, 631,991.70 and 140,867.28

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Solution

The fourth proportional to 421,415.64, 631,991.70 and 140,867.28 is: 211,256.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,415.64 : 631,991.70 = 140,867.28 : x
  2. Step 2: Convert to fraction form
    421,415.64/631,991.70 = 140,867.28/x
  3. Step 3: Cross multiply
    421,415.64x = 631,991.70 × 140,867.28
  4. Step 4: Simplify right side
    421,415.64x = 89,026,951,761.58
  5. Step 5: Solve for x
    x = 89,026,951,761.58/421,415.64
  6. Step 6: Final answer
    x = 211,256.88

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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.