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Finding the Fourth Proportional to 393,401.40, 590,102.10 and 251,683.80

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Solution

The fourth proportional to 393,401.40, 590,102.10 and 251,683.80 is: 377,525.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,401.40 : 590,102.10 = 251,683.80 : x
  2. Step 2: Convert to fraction form
    393,401.40/590,102.10 = 251,683.80/x
  3. Step 3: Cross multiply
    393,401.40x = 590,102.10 × 251,683.80
  4. Step 4: Simplify right side
    393,401.40x = 148,519,138,915.98
  5. Step 5: Solve for x
    x = 148,519,138,915.98/393,401.40
  6. Step 6: Final answer
    x = 377,525.70

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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.