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Finding the Fourth Proportional to 644,811.20, 903,668.80 and 644,811.20

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Solution

The fourth proportional to 644,811.20, 903,668.80 and 644,811.20 is: 903,668.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,811.20 : 903,668.80 = 644,811.20 : x
  2. Step 2: Convert to fraction form
    644,811.20/903,668.80 = 644,811.20/x
  3. Step 3: Cross multiply
    644,811.20x = 903,668.80 × 644,811.20
  4. Step 4: Simplify right side
    644,811.20x = 582,695,763,330.56
  5. Step 5: Solve for x
    x = 582,695,763,330.56/644,811.20
  6. Step 6: Final answer
    x = 903,668.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.