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Finding the Fourth Proportional to 323,416.20, 485,124.30 and 146,123.40

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Solution

The fourth proportional to 323,416.20, 485,124.30 and 146,123.40 is: 219,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,416.20 : 485,124.30 = 146,123.40 : x
  2. Step 2: Convert to fraction form
    323,416.20/485,124.30 = 146,123.40/x
  3. Step 3: Cross multiply
    323,416.20x = 485,124.30 × 146,123.40
  4. Step 4: Simplify right side
    323,416.20x = 70,888,012,138.62
  5. Step 5: Solve for x
    x = 70,888,012,138.62/323,416.20
  6. Step 6: Final answer
    x = 219,185.10

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1.5x scale

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.