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Finding the Fourth Proportional to 394,427.40, 591,641.10 and 371,099.40

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Solution

The fourth proportional to 394,427.40, 591,641.10 and 371,099.40 is: 556,649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,427.40 : 591,641.10 = 371,099.40 : x
  2. Step 2: Convert to fraction form
    394,427.40/591,641.10 = 371,099.40/x
  3. Step 3: Cross multiply
    394,427.40x = 591,641.10 × 371,099.40
  4. Step 4: Simplify right side
    394,427.40x = 219,557,657,225.34
  5. Step 5: Solve for x
    x = 219,557,657,225.34/394,427.40
  6. Step 6: Final answer
    x = 556,649.10

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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.