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Finding the Fourth Proportional to 402,515.67, 555,481.80 and 221,232.21

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Solution

The fourth proportional to 402,515.67, 555,481.80 and 221,232.21 is: 305,306.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,515.67 : 555,481.80 = 221,232.21 : x
  2. Step 2: Convert to fraction form
    402,515.67/555,481.80 = 221,232.21/x
  3. Step 3: Cross multiply
    402,515.67x = 555,481.80 × 221,232.21
  4. Step 4: Simplify right side
    402,515.67x = 122,890,466,228.78
  5. Step 5: Solve for x
    x = 122,890,466,228.78/402,515.67
  6. Step 6: Final answer
    x = 305,306.04

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1.5x scale

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.