Home / 728,917.84-1,005,903.83-406,627.68

Finding the Fourth Proportional to 728,917.84, 1,005,903.83 and 406,627.68

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Solution

The fourth proportional to 728,917.84, 1,005,903.83 and 406,627.68 is: 561,144.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,917.84 : 1,005,903.83 = 406,627.68 : x
  2. Step 2: Convert to fraction form
    728,917.84/1,005,903.83 = 406,627.68/x
  3. Step 3: Cross multiply
    728,917.84x = 1,005,903.83 × 406,627.68
  4. Step 4: Simplify right side
    728,917.84x = 409,028,340,696.01
  5. Step 5: Solve for x
    x = 409,028,340,696.01/728,917.84
  6. Step 6: Final answer
    x = 561,144.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.