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Finding the Fourth Proportional to 629,989.82, 869,367 and 343,515.50

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Solution

The fourth proportional to 629,989.82, 869,367 and 343,515.50 is: 474,041.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,989.82 : 869,367 = 343,515.50 : x
  2. Step 2: Convert to fraction form
    629,989.82/869,367 = 343,515.50/x
  3. Step 3: Cross multiply
    629,989.82x = 869,367 × 343,515.50
  4. Step 4: Simplify right side
    629,989.82x = 298,641,039,688.50
  5. Step 5: Solve for x
    x = 298,641,039,688.50/629,989.82
  6. Step 6: Final answer
    x = 474,041.06

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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.