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Finding the Fourth Proportional to 279,670.15, 419,129.79 and 153,119.40

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Solution

The fourth proportional to 279,670.15, 419,129.79 and 153,119.40 is: 229,473.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,670.15 : 419,129.79 = 153,119.40 : x
  2. Step 2: Convert to fraction form
    279,670.15/419,129.79 = 153,119.40/x
  3. Step 3: Cross multiply
    279,670.15x = 419,129.79 × 153,119.40
  4. Step 4: Simplify right side
    279,670.15x = 64,176,900,682.29
  5. Step 5: Solve for x
    x = 64,176,900,682.29/279,670.15
  6. Step 6: Final answer
    x = 229,473.54

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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.