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Finding the Fourth Proportional to 439,548.80, 659,323.20 and 398,870.60

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Solution

The fourth proportional to 439,548.80, 659,323.20 and 398,870.60 is: 598,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,548.80 : 659,323.20 = 398,870.60 : x
  2. Step 2: Convert to fraction form
    439,548.80/659,323.20 = 398,870.60/x
  3. Step 3: Cross multiply
    439,548.80x = 659,323.20 × 398,870.60
  4. Step 4: Simplify right side
    439,548.80x = 262,984,640,377.92
  5. Step 5: Solve for x
    x = 262,984,640,377.92/439,548.80
  6. Step 6: Final answer
    x = 598,305.90

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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.