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Finding the Fourth Proportional to 398,161.40, 596,435.70 and 247,940.60

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Solution

The fourth proportional to 398,161.40, 596,435.70 and 247,940.60 is: 371,408.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,161.40 : 596,435.70 = 247,940.60 : x
  2. Step 2: Convert to fraction form
    398,161.40/596,435.70 = 247,940.60/x
  3. Step 3: Cross multiply
    398,161.40x = 596,435.70 × 247,940.60
  4. Step 4: Simplify right side
    398,161.40x = 147,880,625,319.42
  5. Step 5: Solve for x
    x = 147,880,625,319.42/398,161.40
  6. Step 6: Final answer
    x = 371,408.74

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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.