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Finding the Fourth Proportional to 297,357.21, 446,031.90 and 72,719.51

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Solution

The fourth proportional to 297,357.21, 446,031.90 and 72,719.51 is: 109,078.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,357.21 : 446,031.90 = 72,719.51 : x
  2. Step 2: Convert to fraction form
    297,357.21/446,031.90 = 72,719.51/x
  3. Step 3: Cross multiply
    297,357.21x = 446,031.90 × 72,719.51
  4. Step 4: Simplify right side
    297,357.21x = 32,435,218,982.21
  5. Step 5: Solve for x
    x = 32,435,218,982.21/297,357.21
  6. Step 6: Final answer
    x = 109,078.30

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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.