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Finding the Fourth Proportional to 1,321,555.30, 1,853,909.90 and 1,321,555.30

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Solution

The fourth proportional to 1,321,555.30, 1,853,909.90 and 1,321,555.30 is: 1,853,909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,555.30 : 1,853,909.90 = 1,321,555.30 : x
  2. Step 2: Convert to fraction form
    1,321,555.30/1,853,909.90 = 1,321,555.30/x
  3. Step 3: Cross multiply
    1,321,555.30x = 1,853,909.90 × 1,321,555.30
  4. Step 4: Simplify right side
    1,321,555.30x = 2,450,044,454,067.47
  5. Step 5: Solve for x
    x = 2,450,044,454,067.47/1,321,555.30
  6. Step 6: Final answer
    x = 1,853,909.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.