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Finding the Fourth Proportional to 520,065.20, 778,369.80 and 377,505.20

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Solution

The fourth proportional to 520,065.20, 778,369.80 and 377,505.20 is: 565,003.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,065.20 : 778,369.80 = 377,505.20 : x
  2. Step 2: Convert to fraction form
    520,065.20/778,369.80 = 377,505.20/x
  3. Step 3: Cross multiply
    520,065.20x = 778,369.80 × 377,505.20
  4. Step 4: Simplify right side
    520,065.20x = 293,838,647,022.96
  5. Step 5: Solve for x
    x = 293,838,647,022.96/520,065.20
  6. Step 6: Final answer
    x = 565,003.48

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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.