Home / 745,136.78-1,028,288.88-405,605

Finding the Fourth Proportional to 745,136.78, 1,028,288.88 and 405,605

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Solution

The fourth proportional to 745,136.78, 1,028,288.88 and 405,605 is: 559,734.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,136.78 : 1,028,288.88 = 405,605 : x
  2. Step 2: Convert to fraction form
    745,136.78/1,028,288.88 = 405,605/x
  3. Step 3: Cross multiply
    745,136.78x = 1,028,288.88 × 405,605
  4. Step 4: Simplify right side
    745,136.78x = 417,079,111,172.40
  5. Step 5: Solve for x
    x = 417,079,111,172.40/745,136.78
  6. Step 6: Final answer
    x = 559,734.97

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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.