Home / 428,035.70-642,315.99-191,578.34

Finding the Fourth Proportional to 428,035.70, 642,315.99 and 191,578.34

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Solution

The fourth proportional to 428,035.70, 642,315.99 and 191,578.34 is: 287,484.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,035.70 : 642,315.99 = 191,578.34 : x
  2. Step 2: Convert to fraction form
    428,035.70/642,315.99 = 191,578.34/x
  3. Step 3: Cross multiply
    428,035.70x = 642,315.99 × 191,578.34
  4. Step 4: Simplify right side
    428,035.70x = 123,053,831,119.66
  5. Step 5: Solve for x
    x = 123,053,831,119.66/428,035.70
  6. Step 6: Final answer
    x = 287,484.97

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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.