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Finding the Fourth Proportional to 399,792.76, 551,712.67 and 218,504.64

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Solution

The fourth proportional to 399,792.76, 551,712.67 and 218,504.64 is: 301,535.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,792.76 : 551,712.67 = 218,504.64 : x
  2. Step 2: Convert to fraction form
    399,792.76/551,712.67 = 218,504.64/x
  3. Step 3: Cross multiply
    399,792.76x = 551,712.67 × 218,504.64
  4. Step 4: Simplify right side
    399,792.76x = 120,551,776,761.07
  5. Step 5: Solve for x
    x = 120,551,776,761.07/399,792.76
  6. Step 6: Final answer
    x = 301,535.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.