Home / 382,984.97-528,439.14-221,830.40

Finding the Fourth Proportional to 382,984.97, 528,439.14 and 221,830.40

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Solution

The fourth proportional to 382,984.97, 528,439.14 and 221,830.40 is: 306,079.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,984.97 : 528,439.14 = 221,830.40 : x
  2. Step 2: Convert to fraction form
    382,984.97/528,439.14 = 221,830.40/x
  3. Step 3: Cross multiply
    382,984.97x = 528,439.14 × 221,830.40
  4. Step 4: Simplify right side
    382,984.97x = 117,223,867,122.95
  5. Step 5: Solve for x
    x = 117,223,867,122.95/382,984.97
  6. Step 6: Final answer
    x = 306,079.55

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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.