Home / 409,259.60-613,985.76-128,776.76

Finding the Fourth Proportional to 409,259.60, 613,985.76 and 128,776.76

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Solution

The fourth proportional to 409,259.60, 613,985.76 and 128,776.76 is: 193,195.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,259.60 : 613,985.76 = 128,776.76 : x
  2. Step 2: Convert to fraction form
    409,259.60/613,985.76 = 128,776.76/x
  3. Step 3: Cross multiply
    409,259.60x = 613,985.76 × 128,776.76
  4. Step 4: Simplify right side
    409,259.60x = 79,067,096,858.94
  5. Step 5: Solve for x
    x = 79,067,096,858.94/409,259.60
  6. Step 6: Final answer
    x = 193,195.46

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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.