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Finding the Fourth Proportional to 768,857.67, 1,061,522.42 and 688,145.22

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Solution

The fourth proportional to 768,857.67, 1,061,522.42 and 688,145.22 is: 950,086.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,857.67 : 1,061,522.42 = 688,145.22 : x
  2. Step 2: Convert to fraction form
    768,857.67/1,061,522.42 = 688,145.22/x
  3. Step 3: Cross multiply
    768,857.67x = 1,061,522.42 × 688,145.22
  4. Step 4: Simplify right side
    768,857.67x = 730,481,575,805.11
  5. Step 5: Solve for x
    x = 730,481,575,805.11/768,857.67
  6. Step 6: Final answer
    x = 950,086.87

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1.5x scale

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.