Home / 431,501.76-647,278.59-131,984.93

Finding the Fourth Proportional to 431,501.76, 647,278.59 and 131,984.93

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Solution

The fourth proportional to 431,501.76, 647,278.59 and 131,984.93 is: 197,985.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,501.76 : 647,278.59 = 131,984.93 : x
  2. Step 2: Convert to fraction form
    431,501.76/647,278.59 = 131,984.93/x
  3. Step 3: Cross multiply
    431,501.76x = 647,278.59 × 131,984.93
  4. Step 4: Simplify right side
    431,501.76x = 85,431,018,731.72
  5. Step 5: Solve for x
    x = 85,431,018,731.72/431,501.76
  6. Step 6: Final answer
    x = 197,985.33

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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.