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Finding the Fourth Proportional to 212,610.60, 318,915.90 and 146,255.40

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Solution

The fourth proportional to 212,610.60, 318,915.90 and 146,255.40 is: 219,383.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,610.60 : 318,915.90 = 146,255.40 : x
  2. Step 2: Convert to fraction form
    212,610.60/318,915.90 = 146,255.40/x
  3. Step 3: Cross multiply
    212,610.60x = 318,915.90 × 146,255.40
  4. Step 4: Simplify right side
    212,610.60x = 46,643,172,520.86
  5. Step 5: Solve for x
    x = 46,643,172,520.86/212,610.60
  6. Step 6: Final answer
    x = 219,383.10

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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.