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Finding the Fourth Proportional to 515,826.36, 711,909.90 and 289,484.28

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Solution

The fourth proportional to 515,826.36, 711,909.90 and 289,484.28 is: 399,527.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,826.36 : 711,909.90 = 289,484.28 : x
  2. Step 2: Convert to fraction form
    515,826.36/711,909.90 = 289,484.28/x
  3. Step 3: Cross multiply
    515,826.36x = 711,909.90 × 289,484.28
  4. Step 4: Simplify right side
    515,826.36x = 206,086,724,826.37
  5. Step 5: Solve for x
    x = 206,086,724,826.37/515,826.36
  6. Step 6: Final answer
    x = 399,527.32

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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.