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Finding the Fourth Proportional to 421,065.54, 581,174.80 and 239,885.15

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Solution

The fourth proportional to 421,065.54, 581,174.80 and 239,885.15 is: 331,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,065.54 : 581,174.80 = 239,885.15 : x
  2. Step 2: Convert to fraction form
    421,065.54/581,174.80 = 239,885.15/x
  3. Step 3: Cross multiply
    421,065.54x = 581,174.80 × 239,885.15
  4. Step 4: Simplify right side
    421,065.54x = 139,415,200,568.63
  5. Step 5: Solve for x
    x = 139,415,200,568.63/421,065.54
  6. Step 6: Final answer
    x = 331,100.95

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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.