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Finding the Fourth Proportional to 421,063.96, 581,001.78 and 239,674.24

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Solution

The fourth proportional to 421,063.96, 581,001.78 and 239,674.24 is: 330,712.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,063.96 : 581,001.78 = 239,674.24 : x
  2. Step 2: Convert to fraction form
    421,063.96/581,001.78 = 239,674.24/x
  3. Step 3: Cross multiply
    421,063.96x = 581,001.78 × 239,674.24
  4. Step 4: Simplify right side
    421,063.96x = 139,251,160,060.15
  5. Step 5: Solve for x
    x = 139,251,160,060.15/421,063.96
  6. Step 6: Final answer
    x = 330,712.61

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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.