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Finding the Fourth Proportional to 323,415.20, 485,122.80 and 146,122.40

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Solution

The fourth proportional to 323,415.20, 485,122.80 and 146,122.40 is: 219,183.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,415.20 : 485,122.80 = 146,122.40 : x
  2. Step 2: Convert to fraction form
    323,415.20/485,122.80 = 146,122.40/x
  3. Step 3: Cross multiply
    323,415.20x = 485,122.80 × 146,122.40
  4. Step 4: Simplify right side
    323,415.20x = 70,887,307,830.72
  5. Step 5: Solve for x
    x = 70,887,307,830.72/323,415.20
  6. Step 6: Final answer
    x = 219,183.60

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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.