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Finding the Fourth Proportional to 421,008.70, 631,087.43 and 181,278.94

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Solution

The fourth proportional to 421,008.70, 631,087.43 and 181,278.94 is: 271,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,008.70 : 631,087.43 = 181,278.94 : x
  2. Step 2: Convert to fraction form
    421,008.70/631,087.43 = 181,278.94/x
  3. Step 3: Cross multiply
    421,008.70x = 631,087.43 × 181,278.94
  4. Step 4: Simplify right side
    421,008.70x = 114,402,860,357.72
  5. Step 5: Solve for x
    x = 114,402,860,357.72/421,008.70
  6. Step 6: Final answer
    x = 271,735.15

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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.