Home / 1,285,861.80-1,928,547-645,987.88

Finding the Fourth Proportional to 1,285,861.80, 1,928,547 and 645,987.88

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Solution

The fourth proportional to 1,285,861.80, 1,928,547 and 645,987.88 is: 968,858.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,861.80 : 1,928,547 = 645,987.88 : x
  2. Step 2: Convert to fraction form
    1,285,861.80/1,928,547 = 645,987.88/x
  3. Step 3: Cross multiply
    1,285,861.80x = 1,928,547 × 645,987.88
  4. Step 4: Simplify right side
    1,285,861.80x = 1,245,817,988,010.36
  5. Step 5: Solve for x
    x = 1,245,817,988,010.36/1,285,861.80
  6. Step 6: Final answer
    x = 968,858.39

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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.