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Finding the Fourth Proportional to 640,122.41, 953,391.58 and 637,028.69

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Solution

The fourth proportional to 640,122.41, 953,391.58 and 637,028.69 is: 948,783.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,122.41 : 953,391.58 = 637,028.69 : x
  2. Step 2: Convert to fraction form
    640,122.41/953,391.58 = 637,028.69/x
  3. Step 3: Cross multiply
    640,122.41x = 953,391.58 × 637,028.69
  4. Step 4: Simplify right side
    640,122.41x = 607,337,782,904.90
  5. Step 5: Solve for x
    x = 607,337,782,904.90/640,122.41
  6. Step 6: Final answer
    x = 948,783.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.