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Finding the Fourth Proportional to 768,115.32, 1,059,703.50 and 481,135.80

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Solution

The fourth proportional to 768,115.32, 1,059,703.50 and 481,135.80 is: 663,782.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,115.32 : 1,059,703.50 = 481,135.80 : x
  2. Step 2: Convert to fraction form
    768,115.32/1,059,703.50 = 481,135.80/x
  3. Step 3: Cross multiply
    768,115.32x = 1,059,703.50 × 481,135.80
  4. Step 4: Simplify right side
    768,115.32x = 509,861,291,235.30
  5. Step 5: Solve for x
    x = 509,861,291,235.30/768,115.32
  6. Step 6: Final answer
    x = 663,782.22

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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.