Home / 305,328.54-421,053.36-281,192.16

Finding the Fourth Proportional to 305,328.54, 421,053.36 and 281,192.16

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Solution

The fourth proportional to 305,328.54, 421,053.36 and 281,192.16 is: 387,768.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,328.54 : 421,053.36 = 281,192.16 : x
  2. Step 2: Convert to fraction form
    305,328.54/421,053.36 = 281,192.16/x
  3. Step 3: Cross multiply
    305,328.54x = 421,053.36 × 281,192.16
  4. Step 4: Simplify right side
    305,328.54x = 118,396,903,773.66
  5. Step 5: Solve for x
    x = 118,396,903,773.66/305,328.54
  6. Step 6: Final answer
    x = 387,768.87

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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.