Home / 780,122.40-1,170,097.20-219,213.60

Finding the Fourth Proportional to 780,122.40, 1,170,097.20 and 219,213.60

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Solution

The fourth proportional to 780,122.40, 1,170,097.20 and 219,213.60 is: 328,796.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,122.40 : 1,170,097.20 = 219,213.60 : x
  2. Step 2: Convert to fraction form
    780,122.40/1,170,097.20 = 219,213.60/x
  3. Step 3: Cross multiply
    780,122.40x = 1,170,097.20 × 219,213.60
  4. Step 4: Simplify right side
    780,122.40x = 256,501,219,561.92
  5. Step 5: Solve for x
    x = 256,501,219,561.92/780,122.40
  6. Step 6: Final answer
    x = 328,796.12

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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.