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Finding the Fourth Proportional to 421,286.51, 581,379.27 and 239,995.76

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Solution

The fourth proportional to 421,286.51, 581,379.27 and 239,995.76 is: 331,196.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,286.51 : 581,379.27 = 239,995.76 : x
  2. Step 2: Convert to fraction form
    421,286.51/581,379.27 = 239,995.76/x
  3. Step 3: Cross multiply
    421,286.51x = 581,379.27 × 239,995.76
  4. Step 4: Simplify right side
    421,286.51x = 139,528,559,751.90
  5. Step 5: Solve for x
    x = 139,528,559,751.90/421,286.51
  6. Step 6: Final answer
    x = 331,196.36

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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.