Home / 485,719.60-728,579.40-190,231.60

Finding the Fourth Proportional to 485,719.60, 728,579.40 and 190,231.60

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Solution

The fourth proportional to 485,719.60, 728,579.40 and 190,231.60 is: 285,347.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,719.60 : 728,579.40 = 190,231.60 : x
  2. Step 2: Convert to fraction form
    485,719.60/728,579.40 = 190,231.60/x
  3. Step 3: Cross multiply
    485,719.60x = 728,579.40 × 190,231.60
  4. Step 4: Simplify right side
    485,719.60x = 138,598,824,989.04
  5. Step 5: Solve for x
    x = 138,598,824,989.04/485,719.60
  6. Step 6: Final answer
    x = 285,347.40

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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.