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Finding the Fourth Proportional to 518,222.76, 777,438.63 and 218,703.66

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Solution

The fourth proportional to 518,222.76, 777,438.63 and 218,703.66 is: 328,099.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,222.76 : 777,438.63 = 218,703.66 : x
  2. Step 2: Convert to fraction form
    518,222.76/777,438.63 = 218,703.66/x
  3. Step 3: Cross multiply
    518,222.76x = 777,438.63 × 218,703.66
  4. Step 4: Simplify right side
    518,222.76x = 170,028,673,806.39
  5. Step 5: Solve for x
    x = 170,028,673,806.39/518,222.76
  6. Step 6: Final answer
    x = 328,099.59

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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.