Home / 382,815.21-528,315.50-221,673.10

Finding the Fourth Proportional to 382,815.21, 528,315.50 and 221,673.10

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Solution

The fourth proportional to 382,815.21, 528,315.50 and 221,673.10 is: 305,926.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,815.21 : 528,315.50 = 221,673.10 : x
  2. Step 2: Convert to fraction form
    382,815.21/528,315.50 = 221,673.10/x
  3. Step 3: Cross multiply
    382,815.21x = 528,315.50 × 221,673.10
  4. Step 4: Simplify right side
    382,815.21x = 117,113,333,554.69
  5. Step 5: Solve for x
    x = 117,113,333,554.69/382,815.21
  6. Step 6: Final answer
    x = 305,926.54

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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.