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Finding the Fourth Proportional to 661,101.63, 991,933.04 and 361,231.93

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Solution

The fourth proportional to 661,101.63, 991,933.04 and 361,231.93 is: 542,001.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,101.63 : 991,933.04 = 361,231.93 : x
  2. Step 2: Convert to fraction form
    661,101.63/991,933.04 = 361,231.93/x
  3. Step 3: Cross multiply
    661,101.63x = 991,933.04 × 361,231.93
  4. Step 4: Simplify right side
    661,101.63x = 358,317,886,469.97
  5. Step 5: Solve for x
    x = 358,317,886,469.97/661,101.63
  6. Step 6: Final answer
    x = 542,001.21

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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.