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Finding the Fourth Proportional to 445,821.13, 668,782.44 and 161,645.51

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Solution

The fourth proportional to 445,821.13, 668,782.44 and 161,645.51 is: 242,486.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,821.13 : 668,782.44 = 161,645.51 : x
  2. Step 2: Convert to fraction form
    445,821.13/668,782.44 = 161,645.51/x
  3. Step 3: Cross multiply
    445,821.13x = 668,782.44 × 161,645.51
  4. Step 4: Simplify right side
    445,821.13x = 108,105,676,502.90
  5. Step 5: Solve for x
    x = 108,105,676,502.90/445,821.13
  6. Step 6: Final answer
    x = 242,486.66

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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.