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Finding the Fourth Proportional to 290,457.86, 435,857.25 and 121,965.17

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Solution

The fourth proportional to 290,457.86, 435,857.25 and 121,965.17 is: 183,019.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,457.86 : 435,857.25 = 121,965.17 : x
  2. Step 2: Convert to fraction form
    290,457.86/435,857.25 = 121,965.17/x
  3. Step 3: Cross multiply
    290,457.86x = 435,857.25 × 121,965.17
  4. Step 4: Simplify right side
    290,457.86x = 53,159,403,591.98
  5. Step 5: Solve for x
    x = 53,159,403,591.98/290,457.86
  6. Step 6: Final answer
    x = 183,019.33

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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.