Home / 629,173.12-868,448.64-428,085.76

Finding the Fourth Proportional to 629,173.12, 868,448.64 and 428,085.76

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Solution

The fourth proportional to 629,173.12, 868,448.64 and 428,085.76 is: 590,887.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,173.12 : 868,448.64 = 428,085.76 : x
  2. Step 2: Convert to fraction form
    629,173.12/868,448.64 = 428,085.76/x
  3. Step 3: Cross multiply
    629,173.12x = 868,448.64 × 428,085.76
  4. Step 4: Simplify right side
    629,173.12x = 371,770,496,075.37
  5. Step 5: Solve for x
    x = 371,770,496,075.37/629,173.12
  6. Step 6: Final answer
    x = 590,887.44

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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.