Home / 816,638.70-1,225,121.57-457,320.54

Finding the Fourth Proportional to 816,638.70, 1,225,121.57 and 457,320.54

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Solution

The fourth proportional to 816,638.70, 1,225,121.57 and 457,320.54 is: 686,072.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,638.70 : 1,225,121.57 = 457,320.54 : x
  2. Step 2: Convert to fraction form
    816,638.70/1,225,121.57 = 457,320.54/x
  3. Step 3: Cross multiply
    816,638.70x = 1,225,121.57 × 457,320.54
  4. Step 4: Simplify right side
    816,638.70x = 560,273,255,671.45
  5. Step 5: Solve for x
    x = 560,273,255,671.45/816,638.70
  6. Step 6: Final answer
    x = 686,072.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.