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Finding the Fourth Proportional to 290,456.79, 435,855.72 and 121,964.16

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Solution

The fourth proportional to 290,456.79, 435,855.72 and 121,964.16 is: 183,017.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,456.79 : 435,855.72 = 121,964.16 : x
  2. Step 2: Convert to fraction form
    290,456.79/435,855.72 = 121,964.16/x
  3. Step 3: Cross multiply
    290,456.79x = 435,855.72 × 121,964.16
  4. Step 4: Simplify right side
    290,456.79x = 53,158,776,771.00
  5. Step 5: Solve for x
    x = 53,158,776,771.00/290,456.79
  6. Step 6: Final answer
    x = 183,017.85

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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.