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Finding the Fourth Proportional to 445,981.60, 667,222.80 and 403,991.20

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Solution

The fourth proportional to 445,981.60, 667,222.80 and 403,991.20 is: 604,401.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,981.60 : 667,222.80 = 403,991.20 : x
  2. Step 2: Convert to fraction form
    445,981.60/667,222.80 = 403,991.20/x
  3. Step 3: Cross multiply
    445,981.60x = 667,222.80 × 403,991.20
  4. Step 4: Simplify right side
    445,981.60x = 269,552,139,639.36
  5. Step 5: Solve for x
    x = 269,552,139,639.36/445,981.60
  6. Step 6: Final answer
    x = 604,401.93

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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.