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Finding the Fourth Proportional to 886,480, 1,329,720 and 221,632

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Solution

The fourth proportional to 886,480, 1,329,720 and 221,632 is: 332,448

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,480 : 1,329,720 = 221,632 : x
  2. Step 2: Convert to fraction form
    886,480/1,329,720 = 221,632/x
  3. Step 3: Cross multiply
    886,480x = 1,329,720 × 221,632
  4. Step 4: Simplify right side
    886,480x = 294,708,503,040
  5. Step 5: Solve for x
    x = 294,708,503,040/886,480
  6. Step 6: Final answer
    x = 332,448

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.