Home / 629,267.70-868,711.32-426,390.78

Finding the Fourth Proportional to 629,267.70, 868,711.32 and 426,390.78

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Solution

The fourth proportional to 629,267.70, 868,711.32 and 426,390.78 is: 588,637.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,267.70 : 868,711.32 = 426,390.78 : x
  2. Step 2: Convert to fraction form
    629,267.70/868,711.32 = 426,390.78/x
  3. Step 3: Cross multiply
    629,267.70x = 868,711.32 × 426,390.78
  4. Step 4: Simplify right side
    629,267.70x = 370,410,497,329.63
  5. Step 5: Solve for x
    x = 370,410,497,329.63/629,267.70
  6. Step 6: Final answer
    x = 588,637.39

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Half scale
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Double scale
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Similar ratio
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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.