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Finding the Fourth Proportional to 705,543.72, 973,660.86 and 399,612.54

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Solution

The fourth proportional to 705,543.72, 973,660.86 and 399,612.54 is: 551,471.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,543.72 : 973,660.86 = 399,612.54 : x
  2. Step 2: Convert to fraction form
    705,543.72/973,660.86 = 399,612.54/x
  3. Step 3: Cross multiply
    705,543.72x = 973,660.86 × 399,612.54
  4. Step 4: Simplify right side
    705,543.72x = 389,087,089,363.18
  5. Step 5: Solve for x
    x = 389,087,089,363.18/705,543.72
  6. Step 6: Final answer
    x = 551,471.27

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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.