Home / 215,680.40-323,520.60-212,181.20

Finding the Fourth Proportional to 215,680.40, 323,520.60 and 212,181.20

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Solution

The fourth proportional to 215,680.40, 323,520.60 and 212,181.20 is: 318,271.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,680.40 : 323,520.60 = 212,181.20 : x
  2. Step 2: Convert to fraction form
    215,680.40/323,520.60 = 212,181.20/x
  3. Step 3: Cross multiply
    215,680.40x = 323,520.60 × 212,181.20
  4. Step 4: Simplify right side
    215,680.40x = 68,644,989,132.72
  5. Step 5: Solve for x
    x = 68,644,989,132.72/215,680.40
  6. Step 6: Final answer
    x = 318,271.80

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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.