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Finding the Fourth Proportional to 215,563.60, 323,345.40 and 147,912.40

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Solution

The fourth proportional to 215,563.60, 323,345.40 and 147,912.40 is: 221,868.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,563.60 : 323,345.40 = 147,912.40 : x
  2. Step 2: Convert to fraction form
    215,563.60/323,345.40 = 147,912.40/x
  3. Step 3: Cross multiply
    215,563.60x = 323,345.40 × 147,912.40
  4. Step 4: Simplify right side
    215,563.60x = 47,826,794,142.96
  5. Step 5: Solve for x
    x = 47,826,794,142.96/215,563.60
  6. Step 6: Final answer
    x = 221,868.60

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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.