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Finding the Fourth Proportional to 445,486.69, 666,633.69 and 385,721.33

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Solution

The fourth proportional to 445,486.69, 666,633.69 and 385,721.33 is: 577,199.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,486.69 : 666,633.69 = 385,721.33 : x
  2. Step 2: Convert to fraction form
    445,486.69/666,633.69 = 385,721.33/x
  3. Step 3: Cross multiply
    445,486.69x = 666,633.69 × 385,721.33
  4. Step 4: Simplify right side
    445,486.69x = 257,134,833,529.61
  5. Step 5: Solve for x
    x = 257,134,833,529.61/445,486.69
  6. Step 6: Final answer
    x = 577,199.82

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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.