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Finding the Fourth Proportional to 661,682.08, 992,429.18 and 212,344.71

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Solution

The fourth proportional to 661,682.08, 992,429.18 and 212,344.71 is: 318,486.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,682.08 : 992,429.18 = 212,344.71 : x
  2. Step 2: Convert to fraction form
    661,682.08/992,429.18 = 212,344.71/x
  3. Step 3: Cross multiply
    661,682.08x = 992,429.18 × 212,344.71
  4. Step 4: Simplify right side
    661,682.08x = 210,737,082,435.60
  5. Step 5: Solve for x
    x = 210,737,082,435.60/661,682.08
  6. Step 6: Final answer
    x = 318,486.91

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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.