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Finding the Fourth Proportional to 355,639.80, 532,811.70 and 281,249.40

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Solution

The fourth proportional to 355,639.80, 532,811.70 and 281,249.40 is: 421,361.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,639.80 : 532,811.70 = 281,249.40 : x
  2. Step 2: Convert to fraction form
    355,639.80/532,811.70 = 281,249.40/x
  3. Step 3: Cross multiply
    355,639.80x = 532,811.70 × 281,249.40
  4. Step 4: Simplify right side
    355,639.80x = 149,852,970,937.98
  5. Step 5: Solve for x
    x = 149,852,970,937.98/355,639.80
  6. Step 6: Final answer
    x = 421,361.64

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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.