Home / 428,231.96-642,297.90-172,054.15

Finding the Fourth Proportional to 428,231.96, 642,297.90 and 172,054.15

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Solution

The fourth proportional to 428,231.96, 642,297.90 and 172,054.15 is: 258,061.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,231.96 : 642,297.90 = 172,054.15 : x
  2. Step 2: Convert to fraction form
    428,231.96/642,297.90 = 172,054.15/x
  3. Step 3: Cross multiply
    428,231.96x = 642,297.90 × 172,054.15
  4. Step 4: Simplify right side
    428,231.96x = 110,510,015,159.53
  5. Step 5: Solve for x
    x = 110,510,015,159.53/428,231.96
  6. Step 6: Final answer
    x = 258,061.11

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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.