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Finding the Fourth Proportional to 300,728.90, 451,019.54 and 132,291.63

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Solution

The fourth proportional to 300,728.90, 451,019.54 and 132,291.63 is: 198,404.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,728.90 : 451,019.54 = 132,291.63 : x
  2. Step 2: Convert to fraction form
    300,728.90/451,019.54 = 132,291.63/x
  3. Step 3: Cross multiply
    300,728.90x = 451,019.54 × 132,291.63
  4. Step 4: Simplify right side
    300,728.90x = 59,666,110,439.18
  5. Step 5: Solve for x
    x = 59,666,110,439.18/300,728.90
  6. Step 6: Final answer
    x = 198,404.98

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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.