Home / 515,905.34-711,949.35-289,550.84

Finding the Fourth Proportional to 515,905.34, 711,949.35 and 289,550.84

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Solution

The fourth proportional to 515,905.34, 711,949.35 and 289,550.84 is: 399,580.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,905.34 : 711,949.35 = 289,550.84 : x
  2. Step 2: Convert to fraction form
    515,905.34/711,949.35 = 289,550.84/x
  3. Step 3: Cross multiply
    515,905.34x = 711,949.35 × 289,550.84
  4. Step 4: Simplify right side
    515,905.34x = 206,145,528,770.21
  5. Step 5: Solve for x
    x = 206,145,528,770.21/515,905.34
  6. Step 6: Final answer
    x = 399,580.15

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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.