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Finding the Fourth Proportional to 520,141.14, 780,226.29 and 254,114.46

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Solution

The fourth proportional to 520,141.14, 780,226.29 and 254,114.46 is: 381,178.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,141.14 : 780,226.29 = 254,114.46 : x
  2. Step 2: Convert to fraction form
    520,141.14/780,226.29 = 254,114.46/x
  3. Step 3: Cross multiply
    520,141.14x = 780,226.29 × 254,114.46
  4. Step 4: Simplify right side
    520,141.14x = 198,266,782,361.15
  5. Step 5: Solve for x
    x = 198,266,782,361.15/520,141.14
  6. Step 6: Final answer
    x = 381,178.81

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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.