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Finding the Fourth Proportional to 505,010.48, 696,891.12 and 289,999.28

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Solution

The fourth proportional to 505,010.48, 696,891.12 and 289,999.28 is: 400,185.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,010.48 : 696,891.12 = 289,999.28 : x
  2. Step 2: Convert to fraction form
    505,010.48/696,891.12 = 289,999.28/x
  3. Step 3: Cross multiply
    505,010.48x = 696,891.12 × 289,999.28
  4. Step 4: Simplify right side
    505,010.48x = 202,097,923,038.39
  5. Step 5: Solve for x
    x = 202,097,923,038.39/505,010.48
  6. Step 6: Final answer
    x = 400,185.60

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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.