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Finding the Fourth Proportional to 388,936, 583,404 and 126,280

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Solution

The fourth proportional to 388,936, 583,404 and 126,280 is: 189,420

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,936 : 583,404 = 126,280 : x
  2. Step 2: Convert to fraction form
    388,936/583,404 = 126,280/x
  3. Step 3: Cross multiply
    388,936x = 583,404 × 126,280
  4. Step 4: Simplify right side
    388,936x = 73,672,257,120
  5. Step 5: Solve for x
    x = 73,672,257,120/388,936
  6. Step 6: Final answer
    x = 189,420

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.