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Finding the Fourth Proportional to 520,163.78, 780,245.66 and 146,186.78

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Solution

The fourth proportional to 520,163.78, 780,245.66 and 146,186.78 is: 219,280.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,163.78 : 780,245.66 = 146,186.78 : x
  2. Step 2: Convert to fraction form
    520,163.78/780,245.66 = 146,186.78/x
  3. Step 3: Cross multiply
    520,163.78x = 780,245.66 × 146,186.78
  4. Step 4: Simplify right side
    520,163.78x = 114,061,597,108.61
  5. Step 5: Solve for x
    x = 114,061,597,108.61/520,163.78
  6. Step 6: Final answer
    x = 219,280.16

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1.5x scale

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.