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Finding the Fourth Proportional to 520,234.55, 780,403.80 and 141,161.30

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Solution

The fourth proportional to 520,234.55, 780,403.80 and 141,161.30 is: 211,756.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,234.55 : 780,403.80 = 141,161.30 : x
  2. Step 2: Convert to fraction form
    520,234.55/780,403.80 = 141,161.30/x
  3. Step 3: Cross multiply
    520,234.55x = 780,403.80 × 141,161.30
  4. Step 4: Simplify right side
    520,234.55x = 110,162,814,932.94
  5. Step 5: Solve for x
    x = 110,162,814,932.94/520,234.55
  6. Step 6: Final answer
    x = 211,756.05

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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.