Home / 919,982.12-1,269,589.68-512,088.39

Finding the Fourth Proportional to 919,982.12, 1,269,589.68 and 512,088.39

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Solution

The fourth proportional to 919,982.12, 1,269,589.68 and 512,088.39 is: 706,689.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,982.12 : 1,269,589.68 = 512,088.39 : x
  2. Step 2: Convert to fraction form
    919,982.12/1,269,589.68 = 512,088.39/x
  3. Step 3: Cross multiply
    919,982.12x = 1,269,589.68 × 512,088.39
  4. Step 4: Simplify right side
    919,982.12x = 650,142,135,191.82
  5. Step 5: Solve for x
    x = 650,142,135,191.82/919,982.12
  6. Step 6: Final answer
    x = 706,689.97

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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.