Home / 520,720.41-777,620.10-515,083.89

Finding the Fourth Proportional to 520,720.41, 777,620.10 and 515,083.89

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Solution

The fourth proportional to 520,720.41, 777,620.10 and 515,083.89 is: 769,202.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,720.41 : 777,620.10 = 515,083.89 : x
  2. Step 2: Convert to fraction form
    520,720.41/777,620.10 = 515,083.89/x
  3. Step 3: Cross multiply
    520,720.41x = 777,620.10 × 515,083.89
  4. Step 4: Simplify right side
    520,720.41x = 400,539,586,050.19
  5. Step 5: Solve for x
    x = 400,539,586,050.19/520,720.41
  6. Step 6: Final answer
    x = 769,202.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.