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Finding the Fourth Proportional to 421,327.98, 631,863.42 and 221,539.98

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Solution

The fourth proportional to 421,327.98, 631,863.42 and 221,539.98 is: 332,242.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,327.98 : 631,863.42 = 221,539.98 : x
  2. Step 2: Convert to fraction form
    421,327.98/631,863.42 = 221,539.98/x
  3. Step 3: Cross multiply
    421,327.98x = 631,863.42 × 221,539.98
  4. Step 4: Simplify right side
    421,327.98x = 139,983,009,429.53
  5. Step 5: Solve for x
    x = 139,983,009,429.53/421,327.98
  6. Step 6: Final answer
    x = 332,242.38

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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.