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Finding the Fourth Proportional to 518,223.51, 777,439.76 and 218,704.41

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Solution

The fourth proportional to 518,223.51, 777,439.76 and 218,704.41 is: 328,100.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,223.51 : 777,439.76 = 218,704.41 : x
  2. Step 2: Convert to fraction form
    518,223.51/777,439.76 = 218,704.41/x
  3. Step 3: Cross multiply
    518,223.51x = 777,439.76 × 218,704.41
  4. Step 4: Simplify right side
    518,223.51x = 170,029,502,927.82
  5. Step 5: Solve for x
    x = 170,029,502,927.82/518,223.51
  6. Step 6: Final answer
    x = 328,100.71

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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.