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Finding the Fourth Proportional to 347,789.20, 521,683.80 and 254,477.20

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Solution

The fourth proportional to 347,789.20, 521,683.80 and 254,477.20 is: 381,715.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,789.20 : 521,683.80 = 254,477.20 : x
  2. Step 2: Convert to fraction form
    347,789.20/521,683.80 = 254,477.20/x
  3. Step 3: Cross multiply
    347,789.20x = 521,683.80 × 254,477.20
  4. Step 4: Simplify right side
    347,789.20x = 132,756,632,709.36
  5. Step 5: Solve for x
    x = 132,756,632,709.36/347,789.20
  6. Step 6: Final answer
    x = 381,715.80

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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.