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Finding the Fourth Proportional to 1,309,590.45, 1,807,482.87 and 819,788.04

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Solution

The fourth proportional to 1,309,590.45, 1,807,482.87 and 819,788.04 is: 1,131,462.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309,590.45 : 1,807,482.87 = 819,788.04 : x
  2. Step 2: Convert to fraction form
    1,309,590.45/1,807,482.87 = 819,788.04/x
  3. Step 3: Cross multiply
    1,309,590.45x = 1,807,482.87 × 819,788.04
  4. Step 4: Simplify right side
    1,309,590.45x = 1,481,752,839,330.88
  5. Step 5: Solve for x
    x = 1,481,752,839,330.88/1,309,590.45
  6. Step 6: Final answer
    x = 1,131,462.77

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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.