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Finding the Fourth Proportional to 1,315,053,888, 1,814,752,126.08 and 728,330,426.88

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Solution

The fourth proportional to 1,315,053,888, 1,814,752,126.08 and 728,330,426.88 is: 1,005,083,672.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,053,888 : 1,814,752,126.08 = 728,330,426.88 : x
  2. Step 2: Convert to fraction form
    1,315,053,888/1,814,752,126.08 = 728,330,426.88/x
  3. Step 3: Cross multiply
    1,315,053,888x = 1,814,752,126.08 × 728,330,426.88
  4. Step 4: Simplify right side
    1,315,053,888x = 1,321,739,190,669,233,920
  5. Step 5: Solve for x
    x = 1,321,739,190,669,233,920/1,315,053,888
  6. Step 6: Final answer
    x = 1,005,083,672.03

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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.