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Finding the Fourth Proportional to 696,385.80, 960,658.70 and 454,809.78

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Solution

The fourth proportional to 696,385.80, 960,658.70 and 454,809.78 is: 627,406.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,385.80 : 960,658.70 = 454,809.78 : x
  2. Step 2: Convert to fraction form
    696,385.80/960,658.70 = 454,809.78/x
  3. Step 3: Cross multiply
    696,385.80x = 960,658.70 × 454,809.78
  4. Step 4: Simplify right side
    696,385.80x = 436,916,972,002.09
  5. Step 5: Solve for x
    x = 436,916,972,002.09/696,385.80
  6. Step 6: Final answer
    x = 627,406.49

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Double scale
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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.