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Finding the Fourth Proportional to 519,760.80, 717,281.73 and 305,055.72

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Solution

The fourth proportional to 519,760.80, 717,281.73 and 305,055.72 is: 420,983.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,760.80 : 717,281.73 = 305,055.72 : x
  2. Step 2: Convert to fraction form
    519,760.80/717,281.73 = 305,055.72/x
  3. Step 3: Cross multiply
    519,760.80x = 717,281.73 × 305,055.72
  4. Step 4: Simplify right side
    519,760.80x = 218,810,894,588.00
  5. Step 5: Solve for x
    x = 218,810,894,588.00/519,760.80
  6. Step 6: Final answer
    x = 420,983.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.