Home / 385,091.21-531,446.05-221,772.51

Finding the Fourth Proportional to 385,091.21, 531,446.05 and 221,772.51

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Solution

The fourth proportional to 385,091.21, 531,446.05 and 221,772.51 is: 306,057.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,091.21 : 531,446.05 = 221,772.51 : x
  2. Step 2: Convert to fraction form
    385,091.21/531,446.05 = 221,772.51/x
  3. Step 3: Cross multiply
    385,091.21x = 531,446.05 × 221,772.51
  4. Step 4: Simplify right side
    385,091.21x = 117,860,122,908.74
  5. Step 5: Solve for x
    x = 117,860,122,908.74/385,091.21
  6. Step 6: Final answer
    x = 306,057.68

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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.