Home / 745,276.80-1,028,481.92-405,745.04

Finding the Fourth Proportional to 745,276.80, 1,028,481.92 and 405,745.04

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Solution

The fourth proportional to 745,276.80, 1,028,481.92 and 405,745.04 is: 559,928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,276.80 : 1,028,481.92 = 405,745.04 : x
  2. Step 2: Convert to fraction form
    745,276.80/1,028,481.92 = 405,745.04/x
  3. Step 3: Cross multiply
    745,276.80x = 1,028,481.92 × 405,745.04
  4. Step 4: Simplify right side
    745,276.80x = 417,301,437,769.68
  5. Step 5: Solve for x
    x = 417,301,437,769.68/745,276.80
  6. Step 6: Final answer
    x = 559,928.12

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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.