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Finding the Fourth Proportional to 520,523.80, 780,056.70 and 414,089.80

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Solution

The fourth proportional to 520,523.80, 780,056.70 and 414,089.80 is: 620,554.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,523.80 : 780,056.70 = 414,089.80 : x
  2. Step 2: Convert to fraction form
    520,523.80/780,056.70 = 414,089.80/x
  3. Step 3: Cross multiply
    520,523.80x = 780,056.70 × 414,089.80
  4. Step 4: Simplify right side
    520,523.80x = 323,013,522,891.66
  5. Step 5: Solve for x
    x = 323,013,522,891.66/520,523.80
  6. Step 6: Final answer
    x = 620,554.76

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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.