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Finding the Fourth Proportional to 305,090.96, 421,005.48 and 170,929.04

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Solution

The fourth proportional to 305,090.96, 421,005.48 and 170,929.04 is: 235,870.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,090.96 : 421,005.48 = 170,929.04 : x
  2. Step 2: Convert to fraction form
    305,090.96/421,005.48 = 170,929.04/x
  3. Step 3: Cross multiply
    305,090.96x = 421,005.48 × 170,929.04
  4. Step 4: Simplify right side
    305,090.96x = 71,962,062,531.14
  5. Step 5: Solve for x
    x = 71,962,062,531.14/305,090.96
  6. Step 6: Final answer
    x = 235,870.84

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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.