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Finding the Fourth Proportional to 618,085.60, 927,128.40 and 513,109.60

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Solution

The fourth proportional to 618,085.60, 927,128.40 and 513,109.60 is: 769,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,085.60 : 927,128.40 = 513,109.60 : x
  2. Step 2: Convert to fraction form
    618,085.60/927,128.40 = 513,109.60/x
  3. Step 3: Cross multiply
    618,085.60x = 927,128.40 × 513,109.60
  4. Step 4: Simplify right side
    618,085.60x = 475,718,482,472.64
  5. Step 5: Solve for x
    x = 475,718,482,472.64/618,085.60
  6. Step 6: Final answer
    x = 769,664.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.