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Finding the Fourth Proportional to 405,473.68, 559,539.56 and 221,716.54

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Solution

The fourth proportional to 405,473.68, 559,539.56 and 221,716.54 is: 305,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,473.68 : 559,539.56 = 221,716.54 : x
  2. Step 2: Convert to fraction form
    405,473.68/559,539.56 = 221,716.54/x
  3. Step 3: Cross multiply
    405,473.68x = 559,539.56 × 221,716.54
  4. Step 4: Simplify right side
    405,473.68x = 124,059,174,391.77
  5. Step 5: Solve for x
    x = 124,059,174,391.77/405,473.68
  6. Step 6: Final answer
    x = 305,961.10

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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.