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Finding the Fourth Proportional to 621,412.96, 930,114.64 and 321,480.52

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Solution

The fourth proportional to 621,412.96, 930,114.64 and 321,480.52 is: 481,183.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,412.96 : 930,114.64 = 321,480.52 : x
  2. Step 2: Convert to fraction form
    621,412.96/930,114.64 = 321,480.52/x
  3. Step 3: Cross multiply
    621,412.96x = 930,114.64 × 321,480.52
  4. Step 4: Simplify right side
    621,412.96x = 299,013,738,126.81
  5. Step 5: Solve for x
    x = 299,013,738,126.81/621,412.96
  6. Step 6: Final answer
    x = 481,183.62

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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.