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Finding the Fourth Proportional to 768,118.32, 1,059,707.64 and 481,138.80

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Solution

The fourth proportional to 768,118.32, 1,059,707.64 and 481,138.80 is: 663,786.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,118.32 : 1,059,707.64 = 481,138.80 : x
  2. Step 2: Convert to fraction form
    768,118.32/1,059,707.64 = 481,138.80/x
  3. Step 3: Cross multiply
    768,118.32x = 1,059,707.64 × 481,138.80
  4. Step 4: Simplify right side
    768,118.32x = 509,866,462,260.43
  5. Step 5: Solve for x
    x = 509,866,462,260.43/768,118.32
  6. Step 6: Final answer
    x = 663,786.36

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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.