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Finding the Fourth Proportional to 696,891.78, 961,356.18 and 455,315.76

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Solution

The fourth proportional to 696,891.78, 961,356.18 and 455,315.76 is: 628,104.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,891.78 : 961,356.18 = 455,315.76 : x
  2. Step 2: Convert to fraction form
    696,891.78/961,356.18 = 455,315.76/x
  3. Step 3: Cross multiply
    696,891.78x = 961,356.18 × 455,315.76
  4. Step 4: Simplify right side
    696,891.78x = 437,720,619,727.40
  5. Step 5: Solve for x
    x = 437,720,619,727.40/696,891.78
  6. Step 6: Final answer
    x = 628,104.15

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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.