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Finding the Fourth Proportional to 439,897.43, 606,984.54 and 256,174.85

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Solution

The fourth proportional to 439,897.43, 606,984.54 and 256,174.85 is: 353,478.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,897.43 : 606,984.54 = 256,174.85 : x
  2. Step 2: Convert to fraction form
    439,897.43/606,984.54 = 256,174.85/x
  3. Step 3: Cross multiply
    439,897.43x = 606,984.54 × 256,174.85
  4. Step 4: Simplify right side
    439,897.43x = 155,494,174,043.63
  5. Step 5: Solve for x
    x = 155,494,174,043.63/439,897.43
  6. Step 6: Final answer
    x = 353,478.25

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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.