Home / 520,629.72-780,385.68-220,857.36

Finding the Fourth Proportional to 520,629.72, 780,385.68 and 220,857.36

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Solution

The fourth proportional to 520,629.72, 780,385.68 and 220,857.36 is: 331,048.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,629.72 : 780,385.68 = 220,857.36 : x
  2. Step 2: Convert to fraction form
    520,629.72/780,385.68 = 220,857.36/x
  3. Step 3: Cross multiply
    520,629.72x = 780,385.68 × 220,857.36
  4. Step 4: Simplify right side
    520,629.72x = 172,353,921,066.61
  5. Step 5: Solve for x
    x = 172,353,921,066.61/520,629.72
  6. Step 6: Final answer
    x = 331,048.95

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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.