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Finding the Fourth Proportional to 384,918, 531,183.60 and 221,606.48

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Solution

The fourth proportional to 384,918, 531,183.60 and 221,606.48 is: 305,815.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,918 : 531,183.60 = 221,606.48 : x
  2. Step 2: Convert to fraction form
    384,918/531,183.60 = 221,606.48/x
  3. Step 3: Cross multiply
    384,918x = 531,183.60 × 221,606.48
  4. Step 4: Simplify right side
    384,918x = 117,713,727,829.73
  5. Step 5: Solve for x
    x = 117,713,727,829.73/384,918
  6. Step 6: Final answer
    x = 305,815.08

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1.5x scale

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.