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Finding the Fourth Proportional to 545,389.92, 818,128.56 and 190,396.08

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Solution

The fourth proportional to 545,389.92, 818,128.56 and 190,396.08 is: 285,609.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,389.92 : 818,128.56 = 190,396.08 : x
  2. Step 2: Convert to fraction form
    545,389.92/818,128.56 = 190,396.08/x
  3. Step 3: Cross multiply
    545,389.92x = 818,128.56 × 190,396.08
  4. Step 4: Simplify right side
    545,389.92x = 155,768,470,760.05
  5. Step 5: Solve for x
    x = 155,768,470,760.05/545,389.92
  6. Step 6: Final answer
    x = 285,609.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.