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Finding the Fourth Proportional to 421,223.99, 631,946.64 and 151,379.37

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Solution

The fourth proportional to 421,223.99, 631,946.64 and 151,379.37 is: 227,108.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,223.99 : 631,946.64 = 151,379.37 : x
  2. Step 2: Convert to fraction form
    421,223.99/631,946.64 = 151,379.37/x
  3. Step 3: Cross multiply
    421,223.99x = 631,946.64 × 151,379.37
  4. Step 4: Simplify right side
    421,223.99x = 95,663,684,236.82
  5. Step 5: Solve for x
    x = 95,663,684,236.82/421,223.99
  6. Step 6: Final answer
    x = 227,108.82

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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.