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Finding the Fourth Proportional to 311,936.80, 467,905.20 and 309,312.40

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Solution

The fourth proportional to 311,936.80, 467,905.20 and 309,312.40 is: 463,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,936.80 : 467,905.20 = 309,312.40 : x
  2. Step 2: Convert to fraction form
    311,936.80/467,905.20 = 309,312.40/x
  3. Step 3: Cross multiply
    311,936.80x = 467,905.20 × 309,312.40
  4. Step 4: Simplify right side
    311,936.80x = 144,728,880,384.48
  5. Step 5: Solve for x
    x = 144,728,880,384.48/311,936.80
  6. Step 6: Final answer
    x = 463,968.60

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Similar ratio
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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.