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Finding the Fourth Proportional to 445,498.74, 666,651.78 and 385,733.40

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Solution

The fourth proportional to 445,498.74, 666,651.78 and 385,733.40 is: 577,217.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,498.74 : 666,651.78 = 385,733.40 : x
  2. Step 2: Convert to fraction form
    445,498.74/666,651.78 = 385,733.40/x
  3. Step 3: Cross multiply
    445,498.74x = 666,651.78 × 385,733.40
  4. Step 4: Simplify right side
    445,498.74x = 257,149,857,715.45
  5. Step 5: Solve for x
    x = 257,149,857,715.45/445,498.74
  6. Step 6: Final answer
    x = 577,217.92

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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.