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Finding the Fourth Proportional to 354,620.40, 532,319.40 and 221,650.80

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Solution

The fourth proportional to 354,620.40, 532,319.40 and 221,650.80 is: 332,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,620.40 : 532,319.40 = 221,650.80 : x
  2. Step 2: Convert to fraction form
    354,620.40/532,319.40 = 221,650.80/x
  3. Step 3: Cross multiply
    354,620.40x = 532,319.40 × 221,650.80
  4. Step 4: Simplify right side
    354,620.40x = 117,989,020,865.52
  5. Step 5: Solve for x
    x = 117,989,020,865.52/354,620.40
  6. Step 6: Final answer
    x = 332,719.21

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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.