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Finding the Fourth Proportional to 371,926.80, 513,390.60 and 221,022

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Solution

The fourth proportional to 371,926.80, 513,390.60 and 221,022 is: 305,088.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,926.80 : 513,390.60 = 221,022 : x
  2. Step 2: Convert to fraction form
    371,926.80/513,390.60 = 221,022/x
  3. Step 3: Cross multiply
    371,926.80x = 513,390.60 × 221,022
  4. Step 4: Simplify right side
    371,926.80x = 113,470,617,193.20
  5. Step 5: Solve for x
    x = 113,470,617,193.20/371,926.80
  6. Step 6: Final answer
    x = 305,088.57

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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.