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Finding the Fourth Proportional to 415,108.80, 622,663.20 and 374,430.60

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Solution

The fourth proportional to 415,108.80, 622,663.20 and 374,430.60 is: 561,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,108.80 : 622,663.20 = 374,430.60 : x
  2. Step 2: Convert to fraction form
    415,108.80/622,663.20 = 374,430.60/x
  3. Step 3: Cross multiply
    415,108.80x = 622,663.20 × 374,430.60
  4. Step 4: Simplify right side
    415,108.80x = 233,144,155,573.92
  5. Step 5: Solve for x
    x = 233,144,155,573.92/415,108.80
  6. Step 6: Final answer
    x = 561,645.90

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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.