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Finding the Fourth Proportional to 215,687.20, 323,530.80 and 162,810.40

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Solution

The fourth proportional to 215,687.20, 323,530.80 and 162,810.40 is: 244,215.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,687.20 : 323,530.80 = 162,810.40 : x
  2. Step 2: Convert to fraction form
    215,687.20/323,530.80 = 162,810.40/x
  3. Step 3: Cross multiply
    215,687.20x = 323,530.80 × 162,810.40
  4. Step 4: Simplify right side
    215,687.20x = 52,674,178,960.32
  5. Step 5: Solve for x
    x = 52,674,178,960.32/215,687.20
  6. Step 6: Final answer
    x = 244,215.60

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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.