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Finding the Fourth Proportional to 777,859.44, 1,073,532.78 and 491,365.68

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Solution

The fourth proportional to 777,859.44, 1,073,532.78 and 491,365.68 is: 678,139.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,859.44 : 1,073,532.78 = 491,365.68 : x
  2. Step 2: Convert to fraction form
    777,859.44/1,073,532.78 = 491,365.68/x
  3. Step 3: Cross multiply
    777,859.44x = 1,073,532.78 × 491,365.68
  4. Step 4: Simplify right side
    777,859.44x = 527,497,164,446.99
  5. Step 5: Solve for x
    x = 527,497,164,446.99/777,859.44
  6. Step 6: Final answer
    x = 678,139.44

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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.