Home / 385,289.12-531,755.40-221,914.22

Finding the Fourth Proportional to 385,289.12, 531,755.40 and 221,914.22

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Solution

The fourth proportional to 385,289.12, 531,755.40 and 221,914.22 is: 306,274.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,289.12 : 531,755.40 = 221,914.22 : x
  2. Step 2: Convert to fraction form
    385,289.12/531,755.40 = 221,914.22/x
  3. Step 3: Cross multiply
    385,289.12x = 531,755.40 × 221,914.22
  4. Step 4: Simplify right side
    385,289.12x = 118,004,084,821.79
  5. Step 5: Solve for x
    x = 118,004,084,821.79/385,289.12
  6. Step 6: Final answer
    x = 306,274.12

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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.