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Finding the Fourth Proportional to 808,486.20, 1,212,559.20 and 408,751.20

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Solution

The fourth proportional to 808,486.20, 1,212,559.20 and 408,751.20 is: 613,040.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,486.20 : 1,212,559.20 = 408,751.20 : x
  2. Step 2: Convert to fraction form
    808,486.20/1,212,559.20 = 408,751.20/x
  3. Step 3: Cross multiply
    808,486.20x = 1,212,559.20 × 408,751.20
  4. Step 4: Simplify right side
    808,486.20x = 495,635,028,071.04
  5. Step 5: Solve for x
    x = 495,635,028,071.04/808,486.20
  6. Step 6: Final answer
    x = 613,040.80

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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.