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Finding the Fourth Proportional to 885,798.20, 1,325,198.10 and 768,769.40

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Solution

The fourth proportional to 885,798.20, 1,325,198.10 and 768,769.40 is: 1,150,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,798.20 : 1,325,198.10 = 768,769.40 : x
  2. Step 2: Convert to fraction form
    885,798.20/1,325,198.10 = 768,769.40/x
  3. Step 3: Cross multiply
    885,798.20x = 1,325,198.10 × 768,769.40
  4. Step 4: Simplify right side
    885,798.20x = 1,018,771,748,218.14
  5. Step 5: Solve for x
    x = 1,018,771,748,218.14/885,798.20
  6. Step 6: Final answer
    x = 1,150,117.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.