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Finding the Fourth Proportional to 1,863,005.80, 2,795,164.80 and 915,743.20

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Solution

The fourth proportional to 1,863,005.80, 2,795,164.80 and 915,743.20 is: 1,373,937.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863,005.80 : 2,795,164.80 = 915,743.20 : x
  2. Step 2: Convert to fraction form
    1,863,005.80/2,795,164.80 = 915,743.20/x
  3. Step 3: Cross multiply
    1,863,005.80x = 2,795,164.80 × 915,743.20
  4. Step 4: Simplify right side
    1,863,005.80x = 2,559,653,158,479.36
  5. Step 5: Solve for x
    x = 2,559,653,158,479.36/1,863,005.80
  6. Step 6: Final answer
    x = 1,373,937.30

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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.