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Finding the Fourth Proportional to 397,591.20, 596,386.80 and 148,240.80

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Solution

The fourth proportional to 397,591.20, 596,386.80 and 148,240.80 is: 222,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,591.20 : 596,386.80 = 148,240.80 : x
  2. Step 2: Convert to fraction form
    397,591.20/596,386.80 = 148,240.80/x
  3. Step 3: Cross multiply
    397,591.20x = 596,386.80 × 148,240.80
  4. Step 4: Simplify right side
    397,591.20x = 88,408,856,341.44
  5. Step 5: Solve for x
    x = 88,408,856,341.44/397,591.20
  6. Step 6: Final answer
    x = 222,361.20

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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.