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Finding the Fourth Proportional to 231,872.40, 347,808.60 and 212,432.40

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Solution

The fourth proportional to 231,872.40, 347,808.60 and 212,432.40 is: 318,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,872.40 : 347,808.60 = 212,432.40 : x
  2. Step 2: Convert to fraction form
    231,872.40/347,808.60 = 212,432.40/x
  3. Step 3: Cross multiply
    231,872.40x = 347,808.60 × 212,432.40
  4. Step 4: Simplify right side
    231,872.40x = 73,885,815,638.64
  5. Step 5: Solve for x
    x = 73,885,815,638.64/231,872.40
  6. Step 6: Final answer
    x = 318,648.60

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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.