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Finding the Fourth Proportional to 445,798.71, 668,797.43 and 209,015.19

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Solution

The fourth proportional to 445,798.71, 668,797.43 and 209,015.19 is: 313,569.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,798.71 : 668,797.43 = 209,015.19 : x
  2. Step 2: Convert to fraction form
    445,798.71/668,797.43 = 209,015.19/x
  3. Step 3: Cross multiply
    445,798.71x = 668,797.43 × 209,015.19
  4. Step 4: Simplify right side
    445,798.71x = 139,788,820,857.89
  5. Step 5: Solve for x
    x = 139,788,820,857.89/445,798.71
  6. Step 6: Final answer
    x = 313,569.37

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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.