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Finding the Fourth Proportional to 522,920.67, 784,290.72 and 138,672.21

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Solution

The fourth proportional to 522,920.67, 784,290.72 and 138,672.21 is: 207,984.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,920.67 : 784,290.72 = 138,672.21 : x
  2. Step 2: Convert to fraction form
    522,920.67/784,290.72 = 138,672.21/x
  3. Step 3: Cross multiply
    522,920.67x = 784,290.72 × 138,672.21
  4. Step 4: Simplify right side
    522,920.67x = 108,759,327,424.89
  5. Step 5: Solve for x
    x = 108,759,327,424.89/522,920.67
  6. Step 6: Final answer
    x = 207,984.37

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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.