Home / 745,500.40-1,028,802.32-405,968.40

Finding the Fourth Proportional to 745,500.40, 1,028,802.32 and 405,968.40

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Solution

The fourth proportional to 745,500.40, 1,028,802.32 and 405,968.40 is: 560,242.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,500.40 : 1,028,802.32 = 405,968.40 : x
  2. Step 2: Convert to fraction form
    745,500.40/1,028,802.32 = 405,968.40/x
  3. Step 3: Cross multiply
    745,500.40x = 1,028,802.32 × 405,968.40
  4. Step 4: Simplify right side
    745,500.40x = 417,661,231,766.69
  5. Step 5: Solve for x
    x = 417,661,231,766.69/745,500.40
  6. Step 6: Final answer
    x = 560,242.80

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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.