Home / 720,009.90-1,079,153.70-320,198.96

Finding the Fourth Proportional to 720,009.90, 1,079,153.70 and 320,198.96

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Solution

The fourth proportional to 720,009.90, 1,079,153.70 and 320,198.96 is: 479,915.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,009.90 : 1,079,153.70 = 320,198.96 : x
  2. Step 2: Convert to fraction form
    720,009.90/1,079,153.70 = 320,198.96/x
  3. Step 3: Cross multiply
    720,009.90x = 1,079,153.70 × 320,198.96
  4. Step 4: Simplify right side
    720,009.90x = 345,543,887,024.38
  5. Step 5: Solve for x
    x = 345,543,887,024.38/720,009.90
  6. Step 6: Final answer
    x = 479,915.47

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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.