Home / 1,290,626.78-1,780,991.80-717,654.65

Finding the Fourth Proportional to 1,290,626.78, 1,780,991.80 and 717,654.65

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Solution

The fourth proportional to 1,290,626.78, 1,780,991.80 and 717,654.65 is: 990,322.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,626.78 : 1,780,991.80 = 717,654.65 : x
  2. Step 2: Convert to fraction form
    1,290,626.78/1,780,991.80 = 717,654.65/x
  3. Step 3: Cross multiply
    1,290,626.78x = 1,780,991.80 × 717,654.65
  4. Step 4: Simplify right side
    1,290,626.78x = 1,278,137,046,881.87
  5. Step 5: Solve for x
    x = 1,278,137,046,881.87/1,290,626.78
  6. Step 6: Final answer
    x = 990,322.74

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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.