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Finding the Fourth Proportional to 321,064.40, 481,423.80 and 133,864.40

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Solution

The fourth proportional to 321,064.40, 481,423.80 and 133,864.40 is: 200,724.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,064.40 : 481,423.80 = 133,864.40 : x
  2. Step 2: Convert to fraction form
    321,064.40/481,423.80 = 133,864.40/x
  3. Step 3: Cross multiply
    321,064.40x = 481,423.80 × 133,864.40
  4. Step 4: Simplify right side
    321,064.40x = 64,445,508,132.72
  5. Step 5: Solve for x
    x = 64,445,508,132.72/321,064.40
  6. Step 6: Final answer
    x = 200,724.55

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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.