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Finding the Fourth Proportional to 661,285.45, 992,209.03 and 361,415.69

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Solution

The fourth proportional to 661,285.45, 992,209.03 and 361,415.69 is: 542,277.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,285.45 : 992,209.03 = 361,415.69 : x
  2. Step 2: Convert to fraction form
    661,285.45/992,209.03 = 361,415.69/x
  3. Step 3: Cross multiply
    661,285.45x = 992,209.03 × 361,415.69
  4. Step 4: Simplify right side
    661,285.45x = 358,599,909,057.88
  5. Step 5: Solve for x
    x = 358,599,909,057.88/661,285.45
  6. Step 6: Final answer
    x = 542,277.03

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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.