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Finding the Fourth Proportional to 394,415.40, 591,623.10 and 371,087.40

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Solution

The fourth proportional to 394,415.40, 591,623.10 and 371,087.40 is: 556,631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,415.40 : 591,623.10 = 371,087.40 : x
  2. Step 2: Convert to fraction form
    394,415.40/591,623.10 = 371,087.40/x
  3. Step 3: Cross multiply
    394,415.40x = 591,623.10 × 371,087.40
  4. Step 4: Simplify right side
    394,415.40x = 219,543,877,958.94
  5. Step 5: Solve for x
    x = 219,543,877,958.94/394,415.40
  6. Step 6: Final answer
    x = 556,631.10

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Double scale
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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.