Home / 745,411.89-1,028,664.04-405,879.33

Finding the Fourth Proportional to 745,411.89, 1,028,664.04 and 405,879.33

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Solution

The fourth proportional to 745,411.89, 1,028,664.04 and 405,879.33 is: 560,111.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,411.89 : 1,028,664.04 = 405,879.33 : x
  2. Step 2: Convert to fraction form
    745,411.89/1,028,664.04 = 405,879.33/x
  3. Step 3: Cross multiply
    745,411.89x = 1,028,664.04 × 405,879.33
  4. Step 4: Simplify right side
    745,411.89x = 417,513,471,350.29
  5. Step 5: Solve for x
    x = 417,513,471,350.29/745,411.89
  6. Step 6: Final answer
    x = 560,111.10

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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.