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Finding the Fourth Proportional to 520,081.90, 780,382.05 and 295,614.70

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Solution

The fourth proportional to 520,081.90, 780,382.05 and 295,614.70 is: 443,569.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,081.90 : 780,382.05 = 295,614.70 : x
  2. Step 2: Convert to fraction form
    520,081.90/780,382.05 = 295,614.70/x
  3. Step 3: Cross multiply
    520,081.90x = 780,382.05 × 295,614.70
  4. Step 4: Simplify right side
    520,081.90x = 230,692,405,596.14
  5. Step 5: Solve for x
    x = 230,692,405,596.14/520,081.90
  6. Step 6: Final answer
    x = 443,569.38

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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.