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Finding the Fourth Proportional to 640,055.09, 883,243.53 and 353,519.81

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Solution

The fourth proportional to 640,055.09, 883,243.53 and 353,519.81 is: 487,839.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,055.09 : 883,243.53 = 353,519.81 : x
  2. Step 2: Convert to fraction form
    640,055.09/883,243.53 = 353,519.81/x
  3. Step 3: Cross multiply
    640,055.09x = 883,243.53 × 353,519.81
  4. Step 4: Simplify right side
    640,055.09x = 312,244,080,493.11
  5. Step 5: Solve for x
    x = 312,244,080,493.11/640,055.09
  6. Step 6: Final answer
    x = 487,839.39

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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.