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Finding the Fourth Proportional to 448,658.30, 672,003.30 and 389,609.30

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Solution

The fourth proportional to 448,658.30, 672,003.30 and 389,609.30 is: 583,559.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,658.30 : 672,003.30 = 389,609.30 : x
  2. Step 2: Convert to fraction form
    448,658.30/672,003.30 = 389,609.30/x
  3. Step 3: Cross multiply
    448,658.30x = 672,003.30 × 389,609.30
  4. Step 4: Simplify right side
    448,658.30x = 261,818,735,310.69
  5. Step 5: Solve for x
    x = 261,818,735,310.69/448,658.30
  6. Step 6: Final answer
    x = 583,559.33

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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.