Home / 513,530.79-770,140.67-139,505.19

Finding the Fourth Proportional to 513,530.79, 770,140.67 and 139,505.19

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Solution

The fourth proportional to 513,530.79, 770,140.67 and 139,505.19 is: 209,215.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,530.79 : 770,140.67 = 139,505.19 : x
  2. Step 2: Convert to fraction form
    513,530.79/770,140.67 = 139,505.19/x
  3. Step 3: Cross multiply
    513,530.79x = 770,140.67 × 139,505.19
  4. Step 4: Simplify right side
    513,530.79x = 107,438,619,797.55
  5. Step 5: Solve for x
    x = 107,438,619,797.55/513,530.79
  6. Step 6: Final answer
    x = 209,215.54

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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.