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Finding the Fourth Proportional to 1,216,646.82, 1,678,983.48 and 672,819.21

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Solution

The fourth proportional to 1,216,646.82, 1,678,983.48 and 672,819.21 is: 928,496.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,646.82 : 1,678,983.48 = 672,819.21 : x
  2. Step 2: Convert to fraction form
    1,216,646.82/1,678,983.48 = 672,819.21/x
  3. Step 3: Cross multiply
    1,216,646.82x = 1,678,983.48 × 672,819.21
  4. Step 4: Simplify right side
    1,216,646.82x = 1,129,652,338,616.65
  5. Step 5: Solve for x
    x = 1,129,652,338,616.65/1,216,646.82
  6. Step 6: Final answer
    x = 928,496.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.