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Finding the Fourth Proportional to 782,840.96, 1,080,320.48 and 443,374.80

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Solution

The fourth proportional to 782,840.96, 1,080,320.48 and 443,374.80 is: 611,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,840.96 : 1,080,320.48 = 443,374.80 : x
  2. Step 2: Convert to fraction form
    782,840.96/1,080,320.48 = 443,374.80/x
  3. Step 3: Cross multiply
    782,840.96x = 1,080,320.48 × 443,374.80
  4. Step 4: Simplify right side
    782,840.96x = 478,986,876,755.90
  5. Step 5: Solve for x
    x = 478,986,876,755.90/782,840.96
  6. Step 6: Final answer
    x = 611,857.20

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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.