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Finding the Fourth Proportional to 519,301.20, 778,368.60 and 219,730.80

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Solution

The fourth proportional to 519,301.20, 778,368.60 and 219,730.80 is: 329,349.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,301.20 : 778,368.60 = 219,730.80 : x
  2. Step 2: Convert to fraction form
    519,301.20/778,368.60 = 219,730.80/x
  3. Step 3: Cross multiply
    519,301.20x = 778,368.60 × 219,730.80
  4. Step 4: Simplify right side
    519,301.20x = 171,031,555,172.88
  5. Step 5: Solve for x
    x = 171,031,555,172.88/519,301.20
  6. Step 6: Final answer
    x = 329,349.43

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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.