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Finding the Fourth Proportional to 448,675.80, 672,029.55 and 389,626.80

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Solution

The fourth proportional to 448,675.80, 672,029.55 and 389,626.80 is: 583,585.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,675.80 : 672,029.55 = 389,626.80 : x
  2. Step 2: Convert to fraction form
    448,675.80/672,029.55 = 389,626.80/x
  3. Step 3: Cross multiply
    448,675.80x = 672,029.55 × 389,626.80
  4. Step 4: Simplify right side
    448,675.80x = 261,840,723,071.94
  5. Step 5: Solve for x
    x = 261,840,723,071.94/448,675.80
  6. Step 6: Final answer
    x = 583,585.57

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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.