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Finding the Fourth Proportional to 423,003.74, 634,357.78 and 170,218.63

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Solution

The fourth proportional to 423,003.74, 634,357.78 and 170,218.63 is: 255,268.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,003.74 : 634,357.78 = 170,218.63 : x
  2. Step 2: Convert to fraction form
    423,003.74/634,357.78 = 170,218.63/x
  3. Step 3: Cross multiply
    423,003.74x = 634,357.78 × 170,218.63
  4. Step 4: Simplify right side
    423,003.74x = 107,979,512,608.84
  5. Step 5: Solve for x
    x = 107,979,512,608.84/423,003.74
  6. Step 6: Final answer
    x = 255,268.46

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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.