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Finding the Fourth Proportional to 1,387,224, 2,080,836 and 389,952

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Solution

The fourth proportional to 1,387,224, 2,080,836 and 389,952 is: 584,928

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,224 : 2,080,836 = 389,952 : x
  2. Step 2: Convert to fraction form
    1,387,224/2,080,836 = 389,952/x
  3. Step 3: Cross multiply
    1,387,224x = 2,080,836 × 389,952
  4. Step 4: Simplify right side
    1,387,224x = 811,426,159,872
  5. Step 5: Solve for x
    x = 811,426,159,872/1,387,224
  6. Step 6: Final answer
    x = 584,928

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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.