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Finding the Fourth Proportional to 640,121.66, 953,390.46 and 637,027.93

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Solution

The fourth proportional to 640,121.66, 953,390.46 and 637,027.93 is: 948,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,121.66 : 953,390.46 = 637,027.93 : x
  2. Step 2: Convert to fraction form
    640,121.66/953,390.46 = 637,027.93/x
  3. Step 3: Cross multiply
    640,121.66x = 953,390.46 × 637,027.93
  4. Step 4: Simplify right side
    640,121.66x = 607,336,354,796.14
  5. Step 5: Solve for x
    x = 607,336,354,796.14/640,121.66
  6. Step 6: Final answer
    x = 948,782.70

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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.