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Finding the Fourth Proportional to 323,744.90, 485,098.95 and 212,807.30

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Solution

The fourth proportional to 323,744.90, 485,098.95 and 212,807.30 is: 318,870.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,744.90 : 485,098.95 = 212,807.30 : x
  2. Step 2: Convert to fraction form
    323,744.90/485,098.95 = 212,807.30/x
  3. Step 3: Cross multiply
    323,744.90x = 485,098.95 × 212,807.30
  4. Step 4: Simplify right side
    323,744.90x = 103,232,597,782.34
  5. Step 5: Solve for x
    x = 103,232,597,782.34/323,744.90
  6. Step 6: Final answer
    x = 318,870.19

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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.