Home / 656,720.56-985,136.76-207,321.20

Finding the Fourth Proportional to 656,720.56, 985,136.76 and 207,321.20

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Solution

The fourth proportional to 656,720.56, 985,136.76 and 207,321.20 is: 310,999.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,720.56 : 985,136.76 = 207,321.20 : x
  2. Step 2: Convert to fraction form
    656,720.56/985,136.76 = 207,321.20/x
  3. Step 3: Cross multiply
    656,720.56x = 985,136.76 × 207,321.20
  4. Step 4: Simplify right side
    656,720.56x = 204,239,735,247.31
  5. Step 5: Solve for x
    x = 204,239,735,247.31/656,720.56
  6. Step 6: Final answer
    x = 310,999.45

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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.