Home / 750,728.18-1,036,021.73-428,431.86

Finding the Fourth Proportional to 750,728.18, 1,036,021.73 and 428,431.86

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Solution

The fourth proportional to 750,728.18, 1,036,021.73 and 428,431.86 is: 591,245.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    750,728.18 : 1,036,021.73 = 428,431.86 : x
  2. Step 2: Convert to fraction form
    750,728.18/1,036,021.73 = 428,431.86/x
  3. Step 3: Cross multiply
    750,728.18x = 1,036,021.73 × 428,431.86
  4. Step 4: Simplify right side
    750,728.18x = 443,864,716,784.32
  5. Step 5: Solve for x
    x = 443,864,716,784.32/750,728.18
  6. Step 6: Final answer
    x = 591,245.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.