Home / 513,719.12-770,500.92-139,771.28

Finding the Fourth Proportional to 513,719.12, 770,500.92 and 139,771.28

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Solution

The fourth proportional to 513,719.12, 770,500.92 and 139,771.28 is: 209,635.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,719.12 : 770,500.92 = 139,771.28 : x
  2. Step 2: Convert to fraction form
    513,719.12/770,500.92 = 139,771.28/x
  3. Step 3: Cross multiply
    513,719.12x = 770,500.92 × 139,771.28
  4. Step 4: Simplify right side
    513,719.12x = 107,693,899,829.58
  5. Step 5: Solve for x
    x = 107,693,899,829.58/513,719.12
  6. Step 6: Final answer
    x = 209,635.76

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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.