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Finding the Fourth Proportional to 354,499.40, 532,137.90 and 221,529.80

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Solution

The fourth proportional to 354,499.40, 532,137.90 and 221,529.80 is: 332,537.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,499.40 : 532,137.90 = 221,529.80 : x
  2. Step 2: Convert to fraction form
    354,499.40/532,137.90 = 221,529.80/x
  3. Step 3: Cross multiply
    354,499.40x = 532,137.90 × 221,529.80
  4. Step 4: Simplify right side
    354,499.40x = 117,884,402,559.42
  5. Step 5: Solve for x
    x = 117,884,402,559.42/354,499.40
  6. Step 6: Final answer
    x = 332,537.66

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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.