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Finding the Fourth Proportional to 415,021.65, 622,040.40 and 372,703.20

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Solution

The fourth proportional to 415,021.65, 622,040.40 and 372,703.20 is: 558,612.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,021.65 : 622,040.40 = 372,703.20 : x
  2. Step 2: Convert to fraction form
    415,021.65/622,040.40 = 372,703.20/x
  3. Step 3: Cross multiply
    415,021.65x = 622,040.40 × 372,703.20
  4. Step 4: Simplify right side
    415,021.65x = 231,836,447,609.28
  5. Step 5: Solve for x
    x = 231,836,447,609.28/415,021.65
  6. Step 6: Final answer
    x = 558,612.90

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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.