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Finding the Fourth Proportional to 415,359.70, 623,039.55 and 131,079.06

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Solution

The fourth proportional to 415,359.70, 623,039.55 and 131,079.06 is: 196,618.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,359.70 : 623,039.55 = 131,079.06 : x
  2. Step 2: Convert to fraction form
    415,359.70/623,039.55 = 131,079.06/x
  3. Step 3: Cross multiply
    415,359.70x = 623,039.55 × 131,079.06
  4. Step 4: Simplify right side
    415,359.70x = 81,667,438,065.28
  5. Step 5: Solve for x
    x = 81,667,438,065.28/415,359.70
  6. Step 6: Final answer
    x = 196,618.59

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Similar ratio
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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.