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Finding the Fourth Proportional to 421,365.84, 581,485.91 and 230,391.56

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Solution

The fourth proportional to 421,365.84, 581,485.91 and 230,391.56 is: 317,940.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,365.84 : 581,485.91 = 230,391.56 : x
  2. Step 2: Convert to fraction form
    421,365.84/581,485.91 = 230,391.56/x
  3. Step 3: Cross multiply
    421,365.84x = 581,485.91 × 230,391.56
  4. Step 4: Simplify right side
    421,365.84x = 133,969,441,863.53
  5. Step 5: Solve for x
    x = 133,969,441,863.53/421,365.84
  6. Step 6: Final answer
    x = 317,940.92

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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.