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Finding the Fourth Proportional to 661,469.37, 992,209.53 and 212,190.93

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Solution

The fourth proportional to 661,469.37, 992,209.53 and 212,190.93 is: 318,288.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,469.37 : 992,209.53 = 212,190.93 : x
  2. Step 2: Convert to fraction form
    661,469.37/992,209.53 = 212,190.93/x
  3. Step 3: Cross multiply
    661,469.37x = 992,209.53 × 212,190.93
  4. Step 4: Simplify right side
    661,469.37x = 210,537,862,925.56
  5. Step 5: Solve for x
    x = 210,537,862,925.56/661,469.37
  6. Step 6: Final answer
    x = 318,288.15

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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.