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Finding the Fourth Proportional to 515,430.83, 711,318.51 and 321,953.11

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Solution

The fourth proportional to 515,430.83, 711,318.51 and 321,953.11 is: 444,310.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,430.83 : 711,318.51 = 321,953.11 : x
  2. Step 2: Convert to fraction form
    515,430.83/711,318.51 = 321,953.11/x
  3. Step 3: Cross multiply
    515,430.83x = 711,318.51 × 321,953.11
  4. Step 4: Simplify right side
    515,430.83x = 229,011,204,716.77
  5. Step 5: Solve for x
    x = 229,011,204,716.77/515,430.83
  6. Step 6: Final answer
    x = 444,310.26

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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.