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Finding the Fourth Proportional to 323,780.90, 485,461.11 and 155,297.30

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Solution

The fourth proportional to 323,780.90, 485,461.11 and 155,297.30 is: 232,845.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,780.90 : 485,461.11 = 155,297.30 : x
  2. Step 2: Convert to fraction form
    323,780.90/485,461.11 = 155,297.30/x
  3. Step 3: Cross multiply
    323,780.90x = 485,461.11 × 155,297.30
  4. Step 4: Simplify right side
    323,780.90x = 75,390,799,638.00
  5. Step 5: Solve for x
    x = 75,390,799,638.00/323,780.90
  6. Step 6: Final answer
    x = 232,845.11

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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.