Home / 431,285.42-647,026.54-131,808.58

Finding the Fourth Proportional to 431,285.42, 647,026.54 and 131,808.58

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Solution

The fourth proportional to 431,285.42, 647,026.54 and 131,808.58 is: 197,742.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,285.42 : 647,026.54 = 131,808.58 : x
  2. Step 2: Convert to fraction form
    431,285.42/647,026.54 = 131,808.58/x
  3. Step 3: Cross multiply
    431,285.42x = 647,026.54 × 131,808.58
  4. Step 4: Simplify right side
    431,285.42x = 85,283,649,459.71
  5. Step 5: Solve for x
    x = 85,283,649,459.71/431,285.42
  6. Step 6: Final answer
    x = 197,742.95

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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.