Home / 1,388,374.20-1,915,943.52-776,519.64

Finding the Fourth Proportional to 1,388,374.20, 1,915,943.52 and 776,519.64

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Solution

The fourth proportional to 1,388,374.20, 1,915,943.52 and 776,519.64 is: 1,071,589.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,374.20 : 1,915,943.52 = 776,519.64 : x
  2. Step 2: Convert to fraction form
    1,388,374.20/1,915,943.52 = 776,519.64/x
  3. Step 3: Cross multiply
    1,388,374.20x = 1,915,943.52 × 776,519.64
  4. Step 4: Simplify right side
    1,388,374.20x = 1,487,767,772,410.73
  5. Step 5: Solve for x
    x = 1,487,767,772,410.73/1,388,374.20
  6. Step 6: Final answer
    x = 1,071,589.90

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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.