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Finding the Fourth Proportional to 321,113.91, 481,820.31 and 143,740.92

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Solution

The fourth proportional to 321,113.91, 481,820.31 and 143,740.92 is: 215,678.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,113.91 : 481,820.31 = 143,740.92 : x
  2. Step 2: Convert to fraction form
    321,113.91/481,820.31 = 143,740.92/x
  3. Step 3: Cross multiply
    321,113.91x = 481,820.31 × 143,740.92
  4. Step 4: Simplify right side
    321,113.91x = 69,257,294,634.09
  5. Step 5: Solve for x
    x = 69,257,294,634.09/321,113.91
  6. Step 6: Final answer
    x = 215,678.28

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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.