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Finding the Fourth Proportional to 520,318.80, 780,499.80 and 165,322.80

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Solution

The fourth proportional to 520,318.80, 780,499.80 and 165,322.80 is: 247,991.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,318.80 : 780,499.80 = 165,322.80 : x
  2. Step 2: Convert to fraction form
    520,318.80/780,499.80 = 165,322.80/x
  3. Step 3: Cross multiply
    520,318.80x = 780,499.80 × 165,322.80
  4. Step 4: Simplify right side
    520,318.80x = 129,034,412,335.44
  5. Step 5: Solve for x
    x = 129,034,412,335.44/520,318.80
  6. Step 6: Final answer
    x = 247,991.06

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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.