Home / 305,108.09-421,216.75-208,457.27

Finding the Fourth Proportional to 305,108.09, 421,216.75 and 208,457.27

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Solution

The fourth proportional to 305,108.09, 421,216.75 and 208,457.27 is: 287,785.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,108.09 : 421,216.75 = 208,457.27 : x
  2. Step 2: Convert to fraction form
    305,108.09/421,216.75 = 208,457.27/x
  3. Step 3: Cross multiply
    305,108.09x = 421,216.75 × 208,457.27
  4. Step 4: Simplify right side
    305,108.09x = 87,805,693,783.27
  5. Step 5: Solve for x
    x = 87,805,693,783.27/305,108.09
  6. Step 6: Final answer
    x = 287,785.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.