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Finding the Fourth Proportional to 981,543.60, 1,354,506.84 and 642,004.56

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Solution

The fourth proportional to 981,543.60, 1,354,506.84 and 642,004.56 is: 885,951.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,543.60 : 1,354,506.84 = 642,004.56 : x
  2. Step 2: Convert to fraction form
    981,543.60/1,354,506.84 = 642,004.56/x
  3. Step 3: Cross multiply
    981,543.60x = 1,354,506.84 × 642,004.56
  4. Step 4: Simplify right side
    981,543.60x = 869,599,567,831.19
  5. Step 5: Solve for x
    x = 869,599,567,831.19/981,543.60
  6. Step 6: Final answer
    x = 885,951.03

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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.