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Finding the Fourth Proportional to 768,843.42, 1,061,502.75 and 688,130.97

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Solution

The fourth proportional to 768,843.42, 1,061,502.75 and 688,130.97 is: 950,067.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,843.42 : 1,061,502.75 = 688,130.97 : x
  2. Step 2: Convert to fraction form
    768,843.42/1,061,502.75 = 688,130.97/x
  3. Step 3: Cross multiply
    768,843.42x = 1,061,502.75 × 688,130.97
  4. Step 4: Simplify right side
    768,843.42x = 730,452,917,015.17
  5. Step 5: Solve for x
    x = 730,452,917,015.17/768,843.42
  6. Step 6: Final answer
    x = 950,067.20

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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.