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Finding the Fourth Proportional to 886,633.29, 1,329,707.64 and 317,908.80

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Solution

The fourth proportional to 886,633.29, 1,329,707.64 and 317,908.80 is: 476,776.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,633.29 : 1,329,707.64 = 317,908.80 : x
  2. Step 2: Convert to fraction form
    886,633.29/1,329,707.64 = 317,908.80/x
  3. Step 3: Cross multiply
    886,633.29x = 1,329,707.64 × 317,908.80
  4. Step 4: Simplify right side
    886,633.29x = 422,725,761,375.39
  5. Step 5: Solve for x
    x = 422,725,761,375.39/886,633.29
  6. Step 6: Final answer
    x = 476,776.32

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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.