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Finding the Fourth Proportional to 815,512, 1,125,406.56 and 457,816

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Solution

The fourth proportional to 815,512, 1,125,406.56 and 457,816 is: 631,786.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,512 : 1,125,406.56 = 457,816 : x
  2. Step 2: Convert to fraction form
    815,512/1,125,406.56 = 457,816/x
  3. Step 3: Cross multiply
    815,512x = 1,125,406.56 × 457,816
  4. Step 4: Simplify right side
    815,512x = 515,229,129,672.96
  5. Step 5: Solve for x
    x = 515,229,129,672.96/815,512
  6. Step 6: Final answer
    x = 631,786.08

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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.