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Finding the Fourth Proportional to 320,574.36, 481,012.74 and 143,065.56

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Solution

The fourth proportional to 320,574.36, 481,012.74 and 143,065.56 is: 214,665.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,574.36 : 481,012.74 = 143,065.56 : x
  2. Step 2: Convert to fraction form
    320,574.36/481,012.74 = 143,065.56/x
  3. Step 3: Cross multiply
    320,574.36x = 481,012.74 × 143,065.56
  4. Step 4: Simplify right side
    320,574.36x = 68,816,357,015.23
  5. Step 5: Solve for x
    x = 68,816,357,015.23/320,574.36
  6. Step 6: Final answer
    x = 214,665.82

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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.