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Finding the Fourth Proportional to 324,912.20, 487,281.90 and 100,272.20

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Solution

The fourth proportional to 324,912.20, 487,281.90 and 100,272.20 is: 150,381.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,912.20 : 487,281.90 = 100,272.20 : x
  2. Step 2: Convert to fraction form
    324,912.20/487,281.90 = 100,272.20/x
  3. Step 3: Cross multiply
    324,912.20x = 487,281.90 × 100,272.20
  4. Step 4: Simplify right side
    324,912.20x = 48,860,828,133.18
  5. Step 5: Solve for x
    x = 48,860,828,133.18/324,912.20
  6. Step 6: Final answer
    x = 150,381.64

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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.