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Finding the Fourth Proportional to 1,379,966.83, 1,904,354.08 and 768,106.42

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Solution

The fourth proportional to 1,379,966.83, 1,904,354.08 and 768,106.42 is: 1,059,986.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,966.83 : 1,904,354.08 = 768,106.42 : x
  2. Step 2: Convert to fraction form
    1,379,966.83/1,904,354.08 = 768,106.42/x
  3. Step 3: Cross multiply
    1,379,966.83x = 1,904,354.08 × 768,106.42
  4. Step 4: Simplify right side
    1,379,966.83x = 1,462,746,588,120.04
  5. Step 5: Solve for x
    x = 1,462,746,588,120.04/1,379,966.83
  6. Step 6: Final answer
    x = 1,059,986.78

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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.