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Finding the Fourth Proportional to 300,987.32, 415,366.55 and 165,020.94

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Solution

The fourth proportional to 300,987.32, 415,366.55 and 165,020.94 is: 227,731.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,987.32 : 415,366.55 = 165,020.94 : x
  2. Step 2: Convert to fraction form
    300,987.32/415,366.55 = 165,020.94/x
  3. Step 3: Cross multiply
    300,987.32x = 415,366.55 × 165,020.94
  4. Step 4: Simplify right side
    300,987.32x = 68,544,177,700.45
  5. Step 5: Solve for x
    x = 68,544,177,700.45/300,987.32
  6. Step 6: Final answer
    x = 227,731.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.