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Finding the Fourth Proportional to 439,760.40, 659,640.60 and 190,928.40

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Solution

The fourth proportional to 439,760.40, 659,640.60 and 190,928.40 is: 286,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,760.40 : 659,640.60 = 190,928.40 : x
  2. Step 2: Convert to fraction form
    439,760.40/659,640.60 = 190,928.40/x
  3. Step 3: Cross multiply
    439,760.40x = 659,640.60 × 190,928.40
  4. Step 4: Simplify right side
    439,760.40x = 125,944,124,333.04
  5. Step 5: Solve for x
    x = 125,944,124,333.04/439,760.40
  6. Step 6: Final answer
    x = 286,392.60

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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.