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Finding the Fourth Proportional to 323,739.80, 485,724.90 and 312,219.80

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Solution

The fourth proportional to 323,739.80, 485,724.90 and 312,219.80 is: 468,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,739.80 : 485,724.90 = 312,219.80 : x
  2. Step 2: Convert to fraction form
    323,739.80/485,724.90 = 312,219.80/x
  3. Step 3: Cross multiply
    323,739.80x = 485,724.90 × 312,219.80
  4. Step 4: Simplify right side
    323,739.80x = 151,652,931,133.02
  5. Step 5: Solve for x
    x = 151,652,931,133.02/323,739.80
  6. Step 6: Final answer
    x = 468,440.80

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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.