Home / 728,010.60-1,004,639.46-405,719.40

Finding the Fourth Proportional to 728,010.60, 1,004,639.46 and 405,719.40

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Solution

The fourth proportional to 728,010.60, 1,004,639.46 and 405,719.40 is: 559,884.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,010.60 : 1,004,639.46 = 405,719.40 : x
  2. Step 2: Convert to fraction form
    728,010.60/1,004,639.46 = 405,719.40/x
  3. Step 3: Cross multiply
    728,010.60x = 1,004,639.46 × 405,719.40
  4. Step 4: Simplify right side
    728,010.60x = 407,601,718,927.52
  5. Step 5: Solve for x
    x = 407,601,718,927.52/728,010.60
  6. Step 6: Final answer
    x = 559,884.32

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1.5x scale

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.