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Finding the Fourth Proportional to 309,405.39, 464,240.40 and 129,532.83

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Solution

The fourth proportional to 309,405.39, 464,240.40 and 129,532.83 is: 194,354.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,405.39 : 464,240.40 = 129,532.83 : x
  2. Step 2: Convert to fraction form
    309,405.39/464,240.40 = 129,532.83/x
  3. Step 3: Cross multiply
    309,405.39x = 464,240.40 × 129,532.83
  4. Step 4: Simplify right side
    309,405.39x = 60,134,372,812.33
  5. Step 5: Solve for x
    x = 60,134,372,812.33/309,405.39
  6. Step 6: Final answer
    x = 194,354.64

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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.