Home / 1,285,356.71-1,928,304.80-386,864.21

Finding the Fourth Proportional to 1,285,356.71, 1,928,304.80 and 386,864.21

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Solution

The fourth proportional to 1,285,356.71, 1,928,304.80 and 386,864.21 is: 580,377.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,356.71 : 1,928,304.80 = 386,864.21 : x
  2. Step 2: Convert to fraction form
    1,285,356.71/1,928,304.80 = 386,864.21/x
  3. Step 3: Cross multiply
    1,285,356.71x = 1,928,304.80 × 386,864.21
  4. Step 4: Simplify right side
    1,285,356.71x = 745,992,113,091.21
  5. Step 5: Solve for x
    x = 745,992,113,091.21/1,285,356.71
  6. Step 6: Final answer
    x = 580,377.50

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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.