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Finding the Fourth Proportional to 415,071.60, 622,607.40 and 265,480.80

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Solution

The fourth proportional to 415,071.60, 622,607.40 and 265,480.80 is: 398,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,071.60 : 622,607.40 = 265,480.80 : x
  2. Step 2: Convert to fraction form
    415,071.60/622,607.40 = 265,480.80/x
  3. Step 3: Cross multiply
    415,071.60x = 622,607.40 × 265,480.80
  4. Step 4: Simplify right side
    415,071.60x = 165,290,310,637.92
  5. Step 5: Solve for x
    x = 165,290,310,637.92/415,071.60
  6. Step 6: Final answer
    x = 398,221.20

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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.