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Finding the Fourth Proportional to 321,008.30, 481,512.45 and 155,120.30

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Solution

The fourth proportional to 321,008.30, 481,512.45 and 155,120.30 is: 232,680.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,008.30 : 481,512.45 = 155,120.30 : x
  2. Step 2: Convert to fraction form
    321,008.30/481,512.45 = 155,120.30/x
  3. Step 3: Cross multiply
    321,008.30x = 481,512.45 × 155,120.30
  4. Step 4: Simplify right side
    321,008.30x = 74,692,355,697.74
  5. Step 5: Solve for x
    x = 74,692,355,697.74/321,008.30
  6. Step 6: Final answer
    x = 232,680.45

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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.