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Finding the Fourth Proportional to 641,683.27, 885,484.87 and 355,186.27

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Solution

The fourth proportional to 641,683.27, 885,484.87 and 355,186.27 is: 490,136.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,683.27 : 885,484.87 = 355,186.27 : x
  2. Step 2: Convert to fraction form
    641,683.27/885,484.87 = 355,186.27/x
  3. Step 3: Cross multiply
    641,683.27x = 885,484.87 × 355,186.27
  4. Step 4: Simplify right side
    641,683.27x = 314,512,068,116.74
  5. Step 5: Solve for x
    x = 314,512,068,116.74/641,683.27
  6. Step 6: Final answer
    x = 490,136.00

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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.