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Finding the Fourth Proportional to 291,905.40, 437,517.90 and 134,149.80

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Solution

The fourth proportional to 291,905.40, 437,517.90 and 134,149.80 is: 201,068.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,905.40 : 437,517.90 = 134,149.80 : x
  2. Step 2: Convert to fraction form
    291,905.40/437,517.90 = 134,149.80/x
  3. Step 3: Cross multiply
    291,905.40x = 437,517.90 × 134,149.80
  4. Step 4: Simplify right side
    291,905.40x = 58,692,938,781.42
  5. Step 5: Solve for x
    x = 58,692,938,781.42/291,905.40
  6. Step 6: Final answer
    x = 201,068.36

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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.