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Finding the Fourth Proportional to 1,387,118, 2,080,677 and 389,846

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Solution

The fourth proportional to 1,387,118, 2,080,677 and 389,846 is: 584,769

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,118 : 2,080,677 = 389,846 : x
  2. Step 2: Convert to fraction form
    1,387,118/2,080,677 = 389,846/x
  3. Step 3: Cross multiply
    1,387,118x = 2,080,677 × 389,846
  4. Step 4: Simplify right side
    1,387,118x = 811,143,605,742
  5. Step 5: Solve for x
    x = 811,143,605,742/1,387,118
  6. Step 6: Final answer
    x = 584,769

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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.