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Finding the Fourth Proportional to 215,679.65, 323,519.70 and 215,368.16

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Solution

The fourth proportional to 215,679.65, 323,519.70 and 215,368.16 is: 323,052.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,679.65 : 323,519.70 = 215,368.16 : x
  2. Step 2: Convert to fraction form
    215,679.65/323,519.70 = 215,368.16/x
  3. Step 3: Cross multiply
    215,679.65x = 323,519.70 × 215,368.16
  4. Step 4: Simplify right side
    215,679.65x = 69,675,840,895.15
  5. Step 5: Solve for x
    x = 69,675,840,895.15/215,679.65
  6. Step 6: Final answer
    x = 323,052.46

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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.